bmesh py api: expose BM_face_split_n() to the python api;

face_fill(..., coords=(v1, v2, ...))

This is the same function the knife tool uses. should be handy for dicing up geometry in py.

source/blender/python/mathutils/mathutils.h

@@ -118,6 +118,7 @@ int _BaseMathObject_WriteIndexCallback(BaseMathObject *self, int index);
 /* utility func */
 int mathutils_array_parse(float *array, int array_min, int array_max, PyObject *value, const char *error_prefix);
 int mathutils_array_parse_alloc(float **array, int array_min, PyObject *value, const char *error_prefix);
+int mathutils_array_parse_alloc_v(float **array, int array_dim, PyObject *value, const char *error_prefix);
 int mathutils_any_to_rotmat(float rmat[3][3], PyObject *value, const char *error_prefix);
 
 int column_vector_multiplication(float rvec[4], VectorObject *vec, MatrixObject *mat);