Merge pull request #556 from bvssvni/master

Removed `ConcurrentGame` and `Game`
Merge pull request #557 from bvssvni/master

Upgraded to latest Rust-Empty
Merge pull request #559 from bvssvni/master

Added warning about using `GameIterator` on another thread
Merge pull request #561 from bvssvni/master

Reexport shader_version
Merge pull request #563 from bvssvni/master

Rexported rust-image
Merge pull request #565 from bvssvni/master

Reexported rust-graphics under Piston
Merge pull request #567 from bvssvni/master

Moved structs to `game_window`
Merge pull request #569 from bvssvni/master

Added `model_view_projection`
Merge pull request #571 from bvssvni/master

Fixed typo
Change to new `use foo as bar` syntax
Merge pull request #573 from lucidd/master

Change to new `use foo as bar` syntax
Reexport input library