(svn r8133) -Fix [FS#535]: "out of sprite memory" warning messages due to incorrect assumption of requested memory for sprites (smatz)

(svn r8132) -Fix (r6824): The game could crash when the chat key (<ENTER>) is pressed too vehemently during the join of the game. Your client's id does not exist in the clients list yet, and returns NULL.

(svn r8131) -Fix (r8125): g++ warning: 'invalid access to non-static data member ?<class>::<member>? of NULL object'. It is weird, but renaming the 'offsetof' macro helped.

(svn r8130) Provide struct GoodsEntry with a constructor

(svn r8129) -Codechange: Change data tables to use split off palette map. And
include a file missed last time...

(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.

(svn r8127) -Fix (r8125): removed redundant free() call which is also in Station destructor (Tron)

(svn r8126) -Fix (r8125): missing #include fixes compilation error on g++ (still some warnings, working on it)

(svn r8125) -Codechange: Station is now constructed/destroyed using new/delete operators (don't worry, they still use the same memory pool). Few station related functions turned into Station::methods (just first step). All this new stuff moved from station_cmd.cpp to the new file (station.cpp).

(svn r8124) -Add [DEBUG]: _debug_station_level