Fix HTTP URLs for 2.0.

There are still failing tests related to allow_mult and YZ schemas.
Fix tests related to allow_mult change.
Fix breakages in yokozuna tests when running the suite multiple times.
Fix the pb port in the teardown.
Fix PEP8 and pyflakes warnings.
More pep8 fixes.
Fix the doc example in version.py
Fix those pesky pep8 bugs in docs/conf.py
Add server version to NotImplementedError messages
Merge pull request #298 from basho/bugfix/sdc/2.0-http-urls

Fix 2.0 URLs for HTTP, allow_mult change, YZ tests