Fixing atomics
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