Upgrade Rust and dependencies

This introduces a temporary fork of freetype-rs. See
PistonDevelopers/freetype-rs#56.

Author: hannobraun

source/rust/platform_desktop/Cargo.toml

@@ -12,7 +12,8 @@ path = "../platform"
 git = "https://github.com/bjz/cgmath-rs.git"
 
 [dependencies.freetype-rs]
-git = "https://github.com/PistonDevelopers/freetype-rs.git"
+#git = "https://github.com/PistonDevelopers/freetype-rs.git"
+git = "https://github.com/hannobraun/freetype-rs.git"
 
 [dependencies.gfx]
 git = "https://github.com/gfx-rs/gfx-rs"