Fix up speech

-Add some new default sharb phrases
-Add overloaded method talk() in entity that accepts a String[] to
randomly generate a string from
-Extract constant for OUCH_PHRASES
-Sharbal doesn't cancel old respondTasks but instead only schedules new
ones if there isn't one already scheduled
Add some more phrases

For fun
Merge branch 'speech_improvements' of
https://github.com/SweatyReptile/loser.git into speech_improvements

Conflicts:
	core/src/com/sweatyreptile/losergame/entities/Sharbal.java