Kill some trailing whitespaces.
Handle META lookups with 0.95+.

Add basic code to de-serialize Get responses as well as
the RegionInfo they contain when doing META lookups.
Dedup byte arrays when deserializing KeyValues from 0.95+.
Make sure we have all the data we need before de-serializing.

Otherwise the protobuf library will complain because we're handing it a
buffer that contains a partial message.
WIP: Start converting GetRequest to HBase 0.95+.