Merge pull request #20 from Gaerzi/master

Improved ZDoom support
Merge pull request #22 from Gaerzi/master

Fix for non MSVC compilers.
Merge pull request #30 from Gaerzi/master

Deleting redundant files
Large commit - changed opening braces to c-style (next line) rather than java style. Not sure why I went with java style in the first place, it's not standard for c and is harder to read
Removed SFML 1.x compatibility stuff, since 2.0 is now officially released
Fixes #34
Merge branch 'master' of git://github.com/sirjuddington/SLADE
Merge pull request #35 from IjonTichy/master

Fixed #34