Changes conversation.ask to use the same pattern matching function as
is used in hears()
Adds controller.changeEars() Developers can now globally change the
way Botkit matches patterns.
Add new middleware hooks. Developers can now change affect a message
as it is received or sent, and can also change the way Botkit matches
patterns in the hears() handler.
Next time I promise to start a change log at v0.0.0