(svn r7640) -Codechange: move a table from industry_cmd.c to table/industry_land
-Codechange: add a reference to the industry GFX enum and some comments to the tables
-Codechange: remove some magic numbers

(svn r7451) -Fix (7372): GetNum(Towns|Industries) should return the actual number of towns and industries.
-Fix (6055): GetMax(Town|Industry)Index should not return the number of towns or industries - 1, but the size of the pool - 1.

(svn r7331) - Codechange: Rename all memory pool macro's and types to "old pool", so the new pool implementation can be committed alongside it.
- Codechange: Rename pool.[ch] to oldpool.[ch].

(svn r7198) -Codechange: Implement a circular tile search function.
Just provide the number of tiles per side, a pointer to a test function, the tile to start searching and voila.
Fixes [FS#364] by removing a lengthy and suboptimal random search pattern.
Thanks Rubidium.

(svn r6965) -CodeChange : Add a climate bitmask member to IndutrySpec.
Removed a loop that used the array _build_industry_types for that purpose.

(svn r6930) -Codechange: Move industry name into IndustrySpec
-Codechange: member color_map is more related to random color, rename it as such

(svn r6904) -CodeChange : Cleanup of industry_cmd (Step-5).
Add member life_type to IndustrySpec and remove the now useless _industry_close_mode array

(svn r6739) -Fix (r6001): Crash on removing farmland belonging to a farm. The search would loop
around the edges causing some troubles. Also make sure that the land after
farm removal is not barren but 2/3rd grass. Better suited.

(svn r6156) -Codechange: DeleteIndustry removes an industry from the pool
-Codechange: DestroyIndustry is called by DeleteIndustry to remove all things where a industry depends on.
Last 2 changes to prepare for new pool system. Not pretty now, will be soon.

(svn r6058) -Fix: Get(Industry|Town)ArraySize could never return 0
Note: _total_towns and _total_industries willb e removed soon, so this 'hack' is okay, for now ;)

(svn r6055) -Codechange: added GetXXXArraySize, which returns HighestID + 1 (or, will do that).
It isn't the best name, but we couldn't find any better.
This unifies the pool-system even more.

(svn r6047) -Codechange: FOR_ALL now _only_ loops valid items, and skips invalid ones
-Codechange: use IsValidXXX where ever possible
Note: both changes to prepare for new pool system, which needs those changes.
For every pool there are 2 ugly lines, which will be removed when done
implementing new pool system.
Based on FS#13 by blathijs, partly implemented.

(svn r6005) -Cleanup: introduce IndustryID and use it
-Cleanup: use TownID and StationID for two instances of uint16

(svn r6001) -Feature: when removing a farm, his farmland is removed too (over time) (based on peter1138's patch, FS#82)
To make this to work, in older games farmland is removed on load, and replanted

(svn r5999) -Feature: change the original date format to a 32 bits format based at the year 0.
The game date subsystem now allows someone to start in the year 0 and continue
up to the year 5 000 000. However, you currently cannot build anything before
1920 as there is no newgrf support for dates before 1920 or after 2090 yet.

(svn r5946) -Add: merged the TGP branch to mainline. TGP adds:
- New optional landscape generator (TerraGenesis Perlin)
- Load heightmaps (either BMP or PNG)
- Progress dialog while generating worlds (no longer a 'hanging' screen)
- New dialogs for NewGame, Create Scenario and Play Heightmap
- Easier to configure your landscape
- More things to configure (tree-placer, ..)
- Speedup of world generation
- New console command 'restart': restart the map EXACTLY as it was when you
first started it (needs a game made after or with this commit)
- New console command 'getseed': get the seed of your map and share it with
others (of course only works with generated maps)
- Many new, world generation related, things
- Many internal cleanups and rewrites
Many tnx to those people who helped making this:
Belugas, DaleStan, glx, KUDr, RichK67, Rubidium, and TrueLight (alfabetic)
Many tnx to those who helped testing:
Arnau, Bjarni, and tokai (alfabetic)
And to all other people who helped testing and sending comments / bugs
Stats: 673 lines changed, 3534 new lines, 79 new strings

(svn r5934) -Cleanup: forgot some conversions to Year and to Date
-Cleanup: use _cur_year instead of _date for some (year based) comparisons
-Cleanup: remove a magic number in favour of another (less) magic number

(svn r5926) -Codechange: make _cur_year contain the full year, instead of the offset since 1920
-Codechange: store all year related variables that are _not_ stored in a savegame/transported over the network in the same format as _cur_year

(svn r5887) -Cleanup: move date related functions, defines and variables to date.[ch]
-Cleanup: fix whitespace related coding style issues in date.[ch]
-Cleanup: make original comments doxygen compatible and remove/change outdated comments

(svn r4920) Remove parameters, which get only used in certain functions, by splitting those functions.
At least in the case of checking for oil industry restrictions this makes the check conditions more clear.

(svn r4614) CodeChange : Cleanup of industry_cmd (Step-4).
Removing the _industry_type_costs in favor of IndustrySpec.cost_multiplier;
In order to let industry_gui use the GetIndustrySpec accessor,
some structs had to be moved in industry.h

(svn r4584) CodeChange : Cleanup of industry_cmd (Step-3).
Renaming GetIndustrySpecification to GetIndustrySpec. Looks better.
Removing the _industry_prod_up/down/close_strings
in favor of IndustrySpec.closure/production_up/down_text;
A few reformatting along the way.
Work of tfc_team

(svn r4578) CodeChange : Cleanup of industry_cmd (Step-2).
Removing the _industry_min_cargo[] in favor of IndustrySpec.minimal_cargo,
IndustrySpec.a,b,c are now conflicting[], add an enum for IndustrySpec.checkproc
Work of tfc_team

(svn r4577) CodeChange : Cleanup of industry_cmd (Step-1).
Add an accessor to _industry_specs array.
Work of tfc_team

(svn r4576) Fix : Temperate bank will no longer appear (during game) in tropic landscape.
This bug is from the original game.

(svn r4572) Remove vehicle_leave_tile_proc
There's exactly one implemented function (unbarring a level crossing) and one place where it can be triggered (a train leaves a level crossing)
It's a bit overkill, so just handle this one case where it can happen

(svn r4425) Fix bug introduced in r4411 : while IS_BYTE_INSIDE, max value is STRICKLY LESS THEN. This caused airports animations to stay unanimated. Industries were similarly affected.
Thanks to Richk67 for finding it.
Also, more Gfx define and use.

(svn r4411) CodeChange : Define and use some Gfx for both stations and industries. More are still to come
Also, a bit of code cleaning, as pointed by Tron

(svn r4342) Change the first two parameters of commands - virtual pixel coordinates of the tile to operate on - to a TileIndex
Remove DoCommandByTile(), because now it does the same as DoCommand()

(svn r3996) -Fix: Slope and height information returned for some tile types is wrong
This leads to graphical glitches when drawing foundations.
This doesn't fix all problems, but at least some of them.

(svn r3895) - Add proper SLE(G)_CONDNULL macros for the empty space reservation in savegames and update where used
- Also add this capability to settings

(svn r3514) -Codechange: Replace direct fiddling of bits for the ground type and density of clear tiles with symbolic names and accessors.
See clear.h for details

(svn r3181) -Bracing
-Indentation
-Whitespace
-DeMorgan's Law
-Test with NULL or 0 for non-booleans
-'\0' instead of 0 for chars
-Remove redundantly redundant comments (like DoFoo(); // Do foo)
-Join multiple short lines with a single statement
-Split single lines with multiple statements
-Avoid assignments in if

(svn r3179) - RandomRange() and RandomTile() instead of home brewed versions
- CHANCE*() instead of mumbling strange numbers

(svn r3078) Some more stuff, which piled up:
- const, whitespace, indentation, bracing, GB/SB, pointless casts
- use the trinary operator where appropriate
- data types (uint[] -> AcceptedCargo, ...)
- if cascade -> switch
- if (ptr) -> if (ptr != NULL)
- DeMorgan's Law
- Fix some comments
- 0 -> '\0', change magic numbers to symbolic constants

(svn r3077) static, const, bracing, indentation, 0 -> '\0'/NULL, typos in comments, excess empty lines, minor other changes
nothing spectacular, just some stuff, which piled up