Refactor ripple_overlay:
  * Use rvalue move to receive accepted sockets
  * Split asio dependent APIs to their own class and file
  * Update documentation
  * Organize code into different files
  * Make some members private
  * Rename things for clarity
Remove obsolete TODO files
Fix 64-bit Visual Studio build
Add [max_peers] doc to example cfg
Refactoring of container usage:
* New ripple container aliases use hardened_hash
* Use std::tuple instead of boost::tuple
* Use std unordered containers instead of boost
* Fix Destroyer for new containers
* Fix warning for fnv1a on 32-bit arch
* Validator fixes for new containers
Fix VS2013 warnings about integer conversions
Quality tests aren't manual
Split RPCHandler into a large number of small parts:
* Handler methods of RPCHandler are extracted into individual files.
* Helper methods of RPCHandler are converted into free functions, and
  extracted into individual files.
* Much code leaves ripple_app/rpc/RPCHandler.cpp and enters ripple_rpc/.
[WIP] Tidy up includes
Add ci_char_traits
New http::client_session for making requests:
- Add 10,000 popular URL data set for unit tests
[WIP]