Merge pull request #24 from bvssvni/master

Upgraded to latest Rust + Rust-Empty
Remove example binary
Change the mutability of raw pointer
Merge pull request #25 from Coeuvre/master

Change the mutability of raw pointer
Change `as i64` to `as FT_Long`
Merge pull request #27 from Coeuvre/master

Change `as i64` to `as FT_Long`
Upgraded to latest Rust + Rust-Empty + Rust-Graphics