quadrangulation, planarization, various other VF functionalities
minor stuff
Merge branch 'master' of https://github.com/libigl/libigl

Conflicts:
	include/igl/embree/reorient_facets_raycast.cpp
	include/igl/local_basis.cpp
	include/igl/min_quad_with_fixed.h
	include/igl/xml/XMLSerializer.h
Merge branch 'master' of https://github.com/libigl/libigl
reorganizing