Merge pull request #18 from bvssvni/master

Fixed enum namespace change
Fixed build status button
Merge pull request #20 from bvssvni/master

Fixed tests
Properly parse smoothing groups.
The Wavefront spec says that the argument to the 's' command is either
an unsigned integer or 'off' (which is equivalent to 0).
[breaking-change]
Merge pull request #22 from Nitori-/master

Properly parse smoothing groups.
Renamed to "wavefront_obj"

Closes https://github.com/PistonDevelopers/wavefront_obj/issues/19