Ignore generated files
Fixed compiling issues with some compilers
SFML2 renderer MeasureText fixed
Fixed annoying warnings when compiling using SFML as platform
SFML2 accelerator (copy and paste) fix
SFML fix for dragging windows outside the rendering region
Replaced Gwen::Event::Packet with void* and added methods for global callbacks
Merge pull request #69 from Wizzard033/master

SFML and MinGW fixes and more