Merge pull request #67 from bvssvni/master

Upgraded to latest Piston
Add SDL2 dep installation to Travis

Add LD_LIBRARY_PATH
Remove Rust-empty
Merge pull request #68 from Indiv0/fix-travis-ci-sdl2

Add SDL2 dep installation to Travis
Merge pull request #69 from Indiv0/remove-rust-empty

Remove Rust-empty
Upgraded to latest Piston