(svn r14488) -Fix: Synchronize drawing of spritelayouts in DrawTileLayout (Houses), IndustryDrawTileLayout, DrawStationTile, DrawTile_Station and DrawTile_Track (Waypoint).
Now transparency options, PALETTE_MODIFIER_TRANSPARENT and SPRITE_MODIFIER_OPAQUE should work for all of them.

(svn r14295) -Fix(r14294): If the house is not built yet, still give me proper coordinates, pretty please!
Plus, two(2) rogue tabs found their way in.

(svn r13603) -Feature{newGRF]: Add var 65 in Variational Action 2 Variables for Houses.
This var will return the manhattan distance of the nearest house that match a given criteria.
The criterias can be: 0 : house ID/ 1 : Class ID/ 2 : grf ID
The search radius can be defined too, up to 64.

(svn r13565) -Change [FS#2077]: when invisibility is set, sprite sequences are now drawn until first non-opaque sprite is found (bit 14 not set)
This is to balance performance, code complexity and NewGRF requirements

(svn r13519) -Feature[newGRF]: Implement var 63, variational action2 variable for Houses.
Or, in more simple terms, the check for the animation frame of nearby house.

(svn r11399) -Feature(ette): transparency settings can now be saved and thus remembered.
-Codechange: Wrap all transparency settings in accessors, hiding the implementation
-Change: Clicking "transparent building" menu will toggle Houses And Trees only. The other options can be used in the transparency gui.
Initial patch by Smatz (FS#1349), with some rework by BigBB and your humble servant.

(svn r10167) -Codechange: Change the flagging system of grf loaded feature from a bitset to a bool evaluation.
Like easier to read and faster to evaluate :)

(svn r9850) -Codechange: Introduction of the Override/Substitute manager. Currently only used for newhouses.
Basically, it is more a gathering of IDs from grf files and ingame data.

(svn r9371) -Feature: Add support for variable snow lines in the arctic climate, supplied
by newgrf files. When this is enabled forests cannot be built below the highest
snow line, and farms can't be built above it. Houses still use the
_opt.snow_line so they are all consistent, so to make them respect the snowline
you may want to use some newhouses features as well.

(svn r9315) -Merge: The newhouses branch. With this merge comes almost complete support for
the newhouses grf specs, so all newhouses grfs will be playable in the game.

Many thanks to everyone who contributed code and ideas, and all the testers
who found things we missed.