(svn r2872) -Feature: [NewGRF] Add support for "extended bytes"
While here work around a buffer overflow in action 4

(svn r2871) -Feature/Fix: Per GRF parameter lists

(svn r2870) \[Translations\] Updating translations

(svn r2869) - Update Watcom project with gfxinit.c

(svn r2868) Change the way NewGRFs are loaded: The loading process i no longer bolted onto the normal graphics loading.
This has two major advantages:
- Removal of a maze of global variables and distinction of cases from the sprite loading routines, which weren't directly related to the loading process in the first place
- NewGRF actions no longer occupy sprite slots - for example when using DBSetXL this saves about 2000 slots! (you could regard this as a bug fix)
If i didn't make a major mistake this change should have no negative effect on NewGRF support, please test!

(svn r2867) \[Translations\] Updating translations

(svn r2866) Move all functions and tables which aren't directly involved in managing the sprite heap to a new file gfxinit.c.
This doesn't ease the global variable mess, but makes the distinction between sprite heap and gfx loading routines easier.

(svn r2865) Push the responsibility for allocating the sprite heap into GfxInitSpriteMem()

(svn r2864) Code simplification and diff reduction

(svn r2863) Move some type declarations into saveload.c, should've been part of r2819