Merge pull request #73 from bvssvni/master

Upgraded to latest Rust in examples
Merge pull request #74 from bvssvni/master

Upgraded
Merge pull request #76 from bvssvni/master

Removed piston dependency
Merge pull request #77 from bvssvni/master

Upgraded to latest piston-graphics
Merge pull request #78 from bvssvni/master

Upgraded window renaming
Upgraded to latest piston-event