Port over code

Still needs docs, selective exports
Start adding docs, selective exports
Export a few type synonyms
Fix error in docs
Start adding support for REST API / Streaming API

Still needs doc cleanup, tests, etc.
Export MessageType class
Formatting, small type tweaks
Bump version
Use TCP keepalive for streams
Merge branch 'streaming-and-rest-support'

Conflicts:
	flowdock.cabal
	src/Chat/Flowdock.hs