Adding preliminary block fem solver in a broken state, carried from a diff repository.
starting halfedge implementation
adding a really poorly written block fem solver that needs to be fixed
hemesh maybe works, need to write a meshloader for this core
mesh render using vcglib works
added gold coloring to mesh
minor positional tweaks of light and materials
Modified coord to work and gave it some decent constructors
Merge branch 'mesh' of github.com:mtao/graphics-sandbox into mesh
Modified fem a bit
Merge branch 'mesh' into fem
Added a default constructor for coord