Update Thrift CPP libraries to work with new generated source, change underlying...

Update Thrift CPP libraries to work with new generated source, change underlying buffers to use uint8_t* instead of std::string

Summary: Major overhaul to the CPP libraries.

Reviewed By: aditya

Test Plan: Again, keep an eye out for the unit tests commit

Notes: Initial perf tests show that Thrift is not only more robust than Pillar, but its implementation is actually around 10-20% faster. We can do about 10 RPC function calls with small data payloads in under 2ms. THAT IS FAST. THAT IS THRIFTY.

git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@664714 13f79535-47bb-0310-9956-ffa450edef68