WebSocket++/0.3.0

• Feature: Adds start_perpetual and stop_perpetual methods to asio transport
  These may be used to replace manually managed asio::io_service::work objects
• Feature: Allow setting pong and handshake timeouts at runtime.
• Feature: Allows changing the listen backlog queue length.
• Feature: Split tcp init into pre and post init.
• Feature: Adds URI method to extract query string from URI. Thank you Banaan
  for code. #298
• Feature: Adds a compile time switch to asio transport config to disable
  certain multithreading features (some locks, asio strands)
• Feature: Adds the ability to pause reading on a connection. Paused connections
  will not read more data from their socket, allowing TCP flow control to work
  without blocking the main thread.
• Feature: Adds the ability to specify whether or not to use the SO_REUSEADDR
  TCP socket option. The default for this value has been changed from true to
  false.
• Feature: Adds the ability to specify a maximum message size.
• Feature: Adds close::status::get_string(...) method to look up a human
  readable string given a close code value.
• Feature: Adds connection::read_all(...) method to iostream transport as a
  convenience method for reading all data into the connection buffer without the
  end user needing to manually loop on read_some.
• Improvement: Open, close, and pong timeouts can be disabled entirely by
  setting their duration to 0.
• Improvement: Numerous performance improvements. Including: tuned default
  buffer sizes based on profiling, caching of handler binding for async
  reads/writes, non-malloc allocators for read/write handlers, disabling of a
  number of questionably useful range sanity checks in tight inner loops.
• Improvement: Cleaned up the handling of TLS related errors. TLS errors will
  now be reported with more detail on the info channel rather than all being
  tls_short_read or pass_through. In addition, many cases where a TLS short
  read was in fact expected are no longer classified as errors. Expected TLS
  short reads and quasi-expected socket shutdown related errors will no longer
  be reported as unclean WebSocket shutdowns to the application. Information
  about them will remain in the info error channel for debugging purposes.
• Improvement: start_accept and listen errors are now reported to the caller
  either via an exception or an ec parameter.
• Improvement: Outgoing writes are now batched for improved message throughput
  and reduced system call and TCP frame overhead.
• Bug: Fix some cases of calls to empty lib::function objects.
• Bug: Fix memory leak of connection objects due to cached handlers holding on to
  reference counted pointers. #310 Thank you otaras for reporting.
• Bug: Fix issue with const endpoint accessors (such as get_user_agent) not
  compiling due to non-const mutex use. #292 Thank you logofive for reporting.
• Bug: Fix handler allocation crash with multithreaded io_service.
• Bug: Fixes incorrect whitespace handling in header parsing. #301 Thank you
  Wolfram Schroers for reporting
• Bug: Fix a crash when parsing empty HTTP headers. Thank you Thingol for
  reporting.
• Bug: Fix a crash following use of the stop_listening function. Thank you
  Thingol for reporting.
• Bug: Fix use of variable names that shadow function parameters. The library
  should compile cleanly with -Wshadow now. Thank you giszo for reporting. #318
• Bug: Fix an issue where set_open_handshake_timeout was ignored by server
  code. Thank you Robin Rowe for reporting.
• Bug: Fix an issue where custom timeout values weren't being propagated from
  endpoints to new connections.
• Bug: Fix a number of memory leaks related to server connection failures. #323
  #333 #334 #335 Thank you droppy and aydany for reporting and patches.
  reporting.
• Compatibility: Fix compile time conflict with Visual Studio's MIN/MAX macros.
  Thank you Robin Rowe for reporting.
• Documentation: Examples and test suite build system now defaults to clang on
  OS X