Modified fem a bit
Merge branch 'mesh' into fem
Added a default constructor for coord
adding preliminary kdop and eigen hashing code - need to actually test it
KDOP now seems to work
Added a kdrop test to graphics core and made kdops half-open slices
Adding ray intersection to kdop
Merge branch 'dev' of github.com:mtao/graphics-sandbox into dev
Also, added ranged kdop intersection tests with rays

Conflicts:
	core/include/kdop.h
Merge branch 'dev' into mesh
basic hetrianglemesh stuff