[win32] bump python version to 2.7.5 and PIL-1.1.7.win32-py2.7

Edit:
The reason why is the HUGE speed increasement in JSON-RPC decoding which every script uses for communicating with our database.
Now simplejson is 1.35x faster than json. With this json is 13.5x faster than simplejson. So imo worth the bump.

See:
http://forum.xbmc.org/showthread.php?tid=173887&pid=1511402#pid1511402