rewrite Histogram's .sample in an iterative style
respond to private messages with a generated sentence
Added some logic for responding

oh god tabs
okay
Merge pull request #6 from jayferd/response_logic

Added some logic for responding
Merge branch 'feature.private-messages'
Merge branch 'refactor.histogram-sample'
Merge branch 'master' into feature.rate-limit

Conflicts:
	src/main/scala/smartbot.scala