Add: allow loading heightmaps from command-line (#11870)

If you want to load a file from tar, you have to give the file
inside the tar in order for it to work:

<tar-file>/<dir-in-tar>/<file>.png

Codechange: automatic adding of _t to (u)int types, and WChar to char32_t

for i in `find src -type f|grep -v 3rdparty/fmt|grep -v 3rdparty/catch2|grep -v 3rdparty/opengl|grep -v stdafx.h`; do sed 's/uint16& /uint16 \&/g;s/int8\([ >*),;[]\)/int8_t\1/g;s/int16\([ >*),;[]\)/int16_t\1/g;s/int32\([ >*),;[]\)/int32_t\1/g;s/int64\([ >*),;[]\)/int64_t\1/g;s/ uint32(/ uint32_t(/g;s/_uint8_t/_uint8/;s/Uint8_t/Uint8/;s/ft_int64_t/ft_int64/g;s/uint64$/uint64_t/;s/WChar/char32_t/g;s/char32_t char32_t/char32_t WChar/' -i $i; done

Codechange: Use unique_ptr for fios company properties.

This is the data used to show company names in the saveload window.

Codechange: Place gamelog into its own class, along with internal data.

Data is now stored in vectors to avoid manual memory management and
passing lengths around.

Feature: Persistant rotation of numbered auto/netsave after restart (#9397)

It was always starting from 0 on openttd restart.
Now the most recent auto/netsave number will be used as a base to generate the next filename.

Add: Filter box to the save and load windows (#6974)

Save and heightmap names can be filtered.

(svn r27729) -Codechange: Do not count static NewGRF when checking for the maximum number of NewGRFs in a game.
-Codechange: Remove LAST_GRF_SLOT and MAX_NEWGRFS. Now NETWORK_MAX_GRF_COUNT is the only constant to specify the maximum number of non-static NewGRF.
-Codechange: Increase the number of file slots, effectively increasing the maximum number of static NewGRF and baseset GRFs.

(svn r15144) -Codechange: make sure we don't run out of bounds while determining old savegame name
Note this can't happen in current code

(svn r13575) -Codechange: Move small vector to core since it fits better in there
-Codechange: convert smallvector from struct to class

(svn r13359) -Codechange: convert _fios_items to a SmallVector
-Cleanup: some reincarnations of _fios_items in the code

(svn r11714) -Fix[FS#1569]: Do not allow player inauguration date on scenarios to be bigger than current year.
This will not (yet) be true if you are loading a scenario with the "-g" command line option.

(svn r7759) -Merge: makefile rewrite. This merge features:
- A proper ./configure, so everything needs to be configured only once, not for every make.
- Usage of makedepend when available. This greatly reduces the time needed for generating the dependencies.
- A generator for all project files. There is a single file with sources, which is used to generate Makefiles and the project files for MSVC.
- Proper support for OSX universal binaries.
- Object files for non-MSVC compiles are also placed in separate directories, making is faster to switch between debug and release compiles and it does not touch the directory with the source files.
- Functionality to make a bundle of all needed files for for example a nightly or distribution of a binary with all needed GRFs and language files.

Note: as this merge moves almost all files, it is recommended to make a backup of your working copy before updating your working copy.