Add all the mesh IO from menpo to here

This includes the landmark types and builtin assets. Some menpo
functionality is copied in here, but not very much.
Move exporting code to menpo3d
Add visualisation here!
Add dependencies required for 3D
Include data folder and specific test dependencies
Merge remote-tracking branch 'upstream/master' into remove_from_menpo

Conflicts:
	setup.py
Merge pull request #1 from menpo/remove_from_menpo

Remove from menpo