Initial support for framed Thrift transports
Initial support for framed Thrift transports

See issue #6.

Add initial support for TFramedTransport in addition to
TBufferedTransport. This means HappyBase can connect to the different
Thrift server implementations in HBase 0.94.x. This is required for the
nonblocking, threadedselector, and hsha implementation. The threadpool
implementation requires TBufferedTransport.

This change is not exposed in the API yet.

wfxiang08/happybase,georgesuperman/happybase,rickysaltzer/happybase,TAKEALOT/happybase,tekton/happybase