bumped bitflags to 0.7
bumped bitflags to 0.7

AngryLawyer/rust-sdl2,Cobrand/rust-sdl2,Cobrand/rust-sdl2,Cobrand/rust-sdl2,Rust-SDL2/rust-sdl2,vadixidav/rust-sdl2,Rust-SDL2/rust-sdl2,Rust-SDL2/rust-sdl2