Blueprint actions may now be overridden again by controller methods. also added/revised some comments on policies.
Policies functional again.  To optimize lift time, added new core event: 'middleware:registered'
Merge remote-tracking branch 'upstream/v0.10' into v0.10

* upstream/v0.10:
  Policies functional again.  To optimize lift time, added new core event: 'middleware:registered'
  Blueprint actions may now be overridden again by controller methods. also added/revised some comments on policies.