- keymap import/export works again (broke with own api changes)

- function renames, move WM functions into collections wm.add_keymap() --> wm.keymaps.new()
  note: new is used for named items in a collection, which return the result.
- Action.get_frame_range() is now a readonly property 'frame_range', floats rather then ints.

release/scripts/io/export_fbx.py

@@ -2760,7 +2760,9 @@ Takes:  {''')
                 else:
                     file.write('\n\tTake: "%s" {' % sane_takename(blenAction))
 
-                act_start, act_end = blenAction.get_frame_range()
+                act_start, act_end = blenAction.frame_range
+                act_start = int(act_start)
+                act_end = int(act_end)
 # 				tmp = blenAction.getFrameNumbers()
 # 				if tmp:
 # 					act_start =	min(tmp)