Use the 1.4.4.0 riak_pb package.
Add 2I term regexp feature from 1.4.4+

This targets the 2.0-stable branch and should be ported to master/Riak
2.0 as well.
Fix some lingering internal uses of RiakClient.solr.
Merge branch 'feature/sdc/2i-term-regex'

Conflicts:
	riak/transports/feature_detect.py
	setup.py