Initial pass at CUnit Integration tests
- Fixed riak_binary Unit test
- Correctly report test failure back to `make`
- Add integration test for ping, server info, list buckets and list keys
Change async callbacks to work under Ubunutu
Fix feeing of bufferevent
Changes suggested by the ever insightful @metadave
Merge pull request #56 from basho/feature/bch/cunit-integration-tests

Couple 'o CUnit Integration Tests