(svn r9531) -Fix (r8661) [FS#692]: The scroll settings were wrong for trains as only a part
of the window should be horizontally scrollable, not all of it. This lead to
wagons without an engine overflowing the window and not being able to scroll to
the end of a train if there was an engine attached.

(svn r8862) -Cleanup: doxygen changes, again. Mostly @files missing tags and a few comments style.
Some documentation addition, when i can easily supply them

(svn r8661) -Fix: [depot windows] Enlarge the blocks in the depot window if a sprite is too big to fit (ships and aircraft only)
-Codechange: depot windows default now makes a 1x1 matrix and resize the window by block size*number of blocks
This will make less vehicle type specific code and easier to read resizing based on sprite sizes

(svn r8621) -Codechange: assigned new numbers to the VEH_(type) enum so that VEH_Train is 0, VEH_Road is 1 and so on
This means that "v->type" can be used as array indexes instead of VehTypeToIndex() (or "v->type - VEH_Train/0x10 as the code still used in some places)
Surprisingly this can be done without changing the savegame format

(svn r8390) -Codechange (r8384): Rewrote ResizeButtons()
Now it only works on first and last widget to resize
It now works with offsets correctly (no longer assumes the left is 0)
It's no longer needed to have a widget right of the ones you resize
Can handle any number of widgets

(svn r8338) -Codechange: merged road vehicle build window into the other ones
Note: now all build vehicle windows are merged into build_vehicle_gui.cpp

(svn r8335) -Feature: the build ship window is now also resizable horizontally and contains sorting options
-Codechange: the build ship window is merged into build_vehicle_gui.cpp

(svn r8331) -Feature: the train and aircraft build windows are now resizable in horizontal direction as well
-Codechange: merged train and aircraft build window code

(svn r8293) -Codechange: overloaded ShowVehicleListWindow() so it can open all types of vehicle lists (depending on arguments)
- Also removed some unneeded arguments
- this also allows removing an if-else cascade in ShowVehicleListWindowLocal()

(svn r8128) -Codechange: Split sprite and palette remap into separate 32 bit values.
This lets us increase the sprite width from 14 to up to 29 bits,
effectively nulling the old sprite limit. Table changes in next commit.