fixed frozen GUI caused by popups
fixed client crash on removing friends. Closes #1077
drop game messages when client isn't ingame. Closes #1081
Fixing atomics
decreased the tees feet size. Closes #1085
Using MemoryBarrier() for CPUs not supporting SSE2
Merge pull request #1084 from cinaera/atomics

Fixing atomics (threading)
 Fixed a missing check if killer is alive in tdm
Fixed removing tattoo/decoration in the skin creator. Closes #1099
prevent map editor from crashing if loaded map is invalid
Made client/server check for correct map version on load. #1100
made skin selector refresh on save and added delete functionality. Closes #1101
updated git ignore
added optional context to a localization string to allow multiple translations. Closes #1082
fixed tabs from last commit
rewrote bam.lua to be cleaner

bam invocation changed: bam compiler=[cl,gcc] arch=[x86,x86_64,ppc,ppc64] conf=[release,debug] [game,server,client,masterserver,versionserver,tools]
using pkg-config for SDL instead of sdl-config if available because of crosscompiling issues
by default binaries will only built for the current architecture on Mac OS X now, like on all other systems
removed unnecessary objs directory
generated files are now in build/ as well
also fixed python invocation on windows again
fixed icon resource location
fixed compiling on OS X