Merge pull request #32 from seemk/master

Additional methods for Face
Added Cargo support to examples
Removed unnecessary lifetime parameters
Merge pull request #33 from Coeuvre/master

Added Cargo support to examples, Removed unnecessary lifetime parameters
Cleanup code:

  1. Made some methods inline.
  2. Replaced `use ffi::*;` with `use ffi;`
Merge pull request #34 from Coeuvre/master

Cleanup code
Updated README.md
Updated examples
Merge pull request #35 from Coeuvre/master

Updated README.md and examples