Changes to compile with cinder_next.

Renderer is hamstrung at the moment as it can't draw paths.
TriMesh2d is now just TriMesh.
ShapeCreation and debug drawing working with cinder_next.

This requires recent additions to cinder_next I am making in the
glNext-drawing branch.
Renderer closes shapes from Box2d.

Box2d passes vertices as if for LINE_LOOP.
We go ahead and close te final vertex for LINE_STRIP to work.
Updated CustomDrawing sample to work with cinder_next.

Only needed to import renderer and set antialiasing differently.
Updating debugDraw matrix commands.