PEP8 fixes
Export BucketType from riak namespace
Update datatypes integration tests, currently failing.
Add datatypes tests to HTTP suite and remove modify_datatype operation.
Add method templates for transport layer.
Add support for fetching datatypes from bucket level, regardless of type.
Fix a few things preventing the integration tests from failing.
Add feature detection for datatypes.
Add fetch capability to PB.
PB updates seem nominally working, tests pass.