Fix VSProject item sorting:
* Use object type in the sort key
* Call _key recursively over containers
* Prevent passing of iterators to xsorted
* Fix VSProject generator with new sorting
Simplify initialization of Pathfinder using C++11 constructs.
Rate-limit SSL client renegotiation (RIPD-360)
Fix version to say 'rippled'
HTTP support improvements:
* Case insensitive equality, inequality operators for strings
* Improvements to message_parser
* Tidy up HTTP method enumeration
* boost::asio buffer helpers
Structured Overlay work:
* New I/O paths for client and server role
* New handshake_analyzer detects the peer protocol
* New basic_message class for parsing and storing HTTP messages
* Conditional compilation for selective feature enabling.
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