* bmesh.types, just allows access to BMVert, BMEdge etc.
* bmesh.utils, so far only added edge_split() function, this module will give access to mesh editing functions.
corrently allows to create and loop over verts/edges/faces, access selection and selection modes.
this is still WIP, access to face, edge verts is still missing, no access to UV's, no access to editing operations yet.
When the api is ready it will be documented by sphinx like mathutils, blf, aud.
