Explicit row locks are no longer supported in HBase 0.95 and up.
The 'getProtocolVersion' RPC no longer exists in 0.95+.
Add support for batched edits with HBase 0.96+.

Add additional integration tests to cover a couple bugs that cropped up
during the initial conversion.
Optimize multi-action a bit with HBase 0.95+ by sorting less.

The protocol buffers used by HBase 0.95+ doesn't allow us to factor out
things like the key or the family, so there is no point in going out of
our way to sort edits within a batch according to those fields.
Remove some warnings that come up when compiling with JDK 7.