bump version to 0.2.2-dev.1
Merge pull request #262 from google/bump-version-0.2.2-dev.1

bump version to 0.2.2-dev.1
split tests into proto tests and non-proto tests to allow running in protoless environments
Merge pull request #263 from yjbanov/split-proto-tests

split tests into proto tests and non-proto tests
Merge remote-tracking branch 'upstream/master' into proto-rpc