=bmesh=

added modal keymap for knife tool.
I'm not sure how to handle the panning
pass-through, it's still hardcoded to
happen on MIDDLEMOUSE.

source/blender/editors/mesh/mesh_ops.c

@@ -338,5 +338,6 @@ void ED_keymap_mesh(wmKeyConfig *keyconf)
 	}
 	
 	ED_object_generic_keymap(keyconf, keymap, 3);
+	knifetool_modal_keymap(keyconf);
 }