Upgraded to latest Rust + Piston
Merge branch 'master' of https://github.com/PistonDevelopers/freetype-rs

Conflicts:
	examples/font_with_piston/font_with_piston.rs
	examples/font_with_piston_cached/font_with_piston_cached.rs
Merge pull request #51 from Coeuvre/master

Upgraded to latest Rust + Piston