Added git ignore file.
Merged patch from knc.svk
http://code.google.com/p/coldemoplayer/issues/detail?id=27
http://code.google.com/p/coldemoplayer/issues/detail?id=25

Don't crash if HLAE crashes.
Merged patch from knc.svk
http://code.google.com/p/coldemoplayer/issues/detail?id=25

Support custom Steam hl.exe path.