(svn r8841) -Fix

Remove {,u}intswap() and replace them by Swap()

(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 r8276) -Fix

Change the signature of Swap() to be less error prone, i.e. pass the variables to be swapped by reference instead of passing pointers to the variables.
Just do Swap(x, y) instead of Swap(&x, &y). This prevents accidents when the variables are pointers.

(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.