Fixed typo
fixes to slot cache, more reliable during cluster resharding operations.
connection errors can be reported in the response parsing step too, have to handle it
Merge pull request #59 from happybits/unstable-slot-cache

fixes to slot cache, more reliable during cluster resharding operations.
Change from pep8 to flake8 in tox
Fix errors reported by flake8
Add item to CHANGES
Add requirements and dev-requirements.txt files
Minor updates to README
Update version strings and change from Alpha to Beta status
No flake8 warnings/errors on xrange that uses redis-py _compat variables
Add missing xrange import