0.9.4

• Added tag hint, which allows replacing notifications more easily without managing id's. Usage here.
• Config now accepts all permutations of anchor positions, to avoid confusion. (#30)
  • E.g. You can now do hook: Hook(parent_anchor: TR, self_anchor: RT) -- notice the flipped TR and RT.
• MM is now a valid anchor point, allowing stuff like notifications anchored to the middle of the screen. (#27)