Merge pull request #38 from lucidd/master

Update examples to latest Rust and gfx-rs
Merge pull request #39 from lucidd/master

Update gfx examples to latest gfx-rs
Upgraded to latest Piston
Merge pull request #40 from bvssvni/master

Upgraded to latest Piston
Upgraded to latest Piston
Merge pull request #41 from bvssvni/master

Upgraded to latest Piston
Upgraded to latest Piston
Merge pull request #42 from bvssvni/master

Upgraded to latest Piston
Add rust-ci

Add glfw build scripts
Merge pull request #43 from Indiv0/add-rust-ci

Add rust-ci and Travis CI
Upgraded to latest gfx-rs
Merge pull request #44 from bvssvni/master

Upgraded to latest gfx-rs
Add SDL2 to make travis happy