v0.14.0

NOTE: This release introduces breaking changes to the API!

This realease replaces before, after, related methods and the phase concept
with 'filters'. Filters are described in detail in the documentation.

Views are now implemented as a separate module: hub-namespace.

• Removed before, after, onceBefore and onceAfter.
• Removed this.stop() and this.stopped.
• Removed un and view.
• Removed the ability to register mutliple event listeners at once
  (on({...}) and on(prefix, {...})).
• Matchers and listeners are not executed in separate phases anymore. Throwing
  in a matcher will still invoke the listeners.
• Adding a listener in a matcher will no longer execute the listener in the
  current emit call.
• Removed namespaced error events. Errors are only emitted to error listeners
  if present.
• Not emitting error events to matchers.
• Not emitting newListener and removeListener events to matchers.
• Renamed removeAllMatching to removeMatchingListeners.
• Added addFilter, removeFilter, filterOnce, filters,
  filtersMatching, removeAllFilters, removeMatchingFilters.
• Emitting newFilter and removeFilter events.
• Fix: Unsubscribing listeners registered with once did nothing.
• Upgraded consolify to v0.4.0 and added browser-reload.
• Added benchmarks and improved wildcard emit performance.