1.1.0 release.

Support concurrent queue (https://github.com/cameron314/concurrentqueue), it's lock-free.
Optimize locks on msg sending and dispatching.
Drop original congestion control and add a semi-automatic congestion control.
Drop post_msg_buffer and corresponding functions (like post_msg()), timer (ascs::socket::TIMER_HANDLE_POST_BUFFER).

include/ascs/config.h

@@ -31,7 +31,7 @@
  * Add enum shutdown_states.
  * Rename class ascs::std_list to ascs::list.
  * ascs::timer now can be used independently.
- * Add a new type ascs::st_timer::tid to represent timer ID.
+ * Add a new type ascs::timer::tid to represent timer ID.
  * Add a new packer--fixed_length_packer.
  * Add a new class--message_queue.
  *