* New maybe_const_t alias for maybe_const
* New asio::enable_wait_for_async for safe cleanup
* New asio::memory_buffer, a managed boost::asio compatible buffer
* shared_handler improvements:
- Can be 'empty' (no stored handler).
- Default constructible as 'empty'.
- Safe evaluation in bool contexts, false==empty
* Fix is_call_possible metafunction:
- Works on empty argument lists
- Works with reference types
* Replace SafeBool idiom with C++11 explicit operator bool
* Move IPAddress function definitions to the header
* Move cyclic_iterator to container/
* Remove unused BufferType
* Remove obsolete classes:
- NamedPipe
- ReadWriteLock
- ScopedReadLock
- ScopedWriteLock
- LockGuard
