Allow a developer to specify DUMMY_HTTP_PORT and DUMMY_PB_PORT env vars
Update Riak Search link
refactor test flags out into __init__.py
Merge branch 'dp_test_ports' of github.com:/basho/riak-python-client into dp_test_ports
search/yz + index tests off by default
pep8 + pyflakes cleanup
Merge pull request #317 from basho/dp_test_ports

Refactor test env vars into init module, add additional vars to control test port numbers