sync tests with redis-py
fix inconsistent use of tabs and spaces in indentation
add tests for extended set options added in Redis 2.6.12
sync missing tests
remove staled files
add ability to route read redis commands to masters if specified
bump version for release on pypi
support drone.io ci by removing hardcoded redis-server path
add drone.io badge to readme
Merge remote-tracking branch 'upstream/master'

Conflicts:
	README.rst
	rediscluster/cluster_client.py