Update CHANGES with 0.2.0 changes
Change redis dependency to >=2.10.2
Update version number to expected release number
Move some global methods from client.py to utils.py
Move ClusterPubSub into pubsub.py. Update README. Monkeypath ClusterPubSub & StrictClusterPipeline into redis package.
Add missing import for ClusterPubSub
Changes:
 - Updates to .gitignore
 - Make path to redis-trib a variable in Makefile
 - Add gitter link
 - Block execution on python 3.4.0 because of segfault bug.
 - Add Neuron Teckid to Authors
 - Add handling of CLUSTERDOWN error for both normal and pipeline
 - 'mock' lib is now required to testing
 - Alot of minor code cleanup and fixes