Version 0.2.0

Major Changes

• Moved all the WebSockex.Client module functionality into the base WebSockex module.
• Roll handle_connect_failure functionality into handle_disconnect.
• Roll init functionality into handle_connect

Detailed Changes

• Roll init functionality into handle_connect
  • handle_connect will be invoked upon establishing any connection, i.e., the intial connection and when reconnecting.
  • The init callback is removed entirely.
• Moved all the WebSockex.Client module functionality into the base
  WebSockex module.
• Changed the Application module to WebSockex.Application.
• Add WebSockex.start for non-linked processes.
• Add async option to start and start_link.
• Roll handle_connect_failure functionality into handle_disconnect.
  • The first parameter of handle_disconnect is now a map with the keys: :reason, :conn, and :attempt_number.
  • handle_disconnect now has another return option for when wanted to reconnect with different URI options or headers: {:reconnect, new_conn, new_state}
  • Added the :handle_initial_conn_failure option to the options for start and start_link that will allow handle_disconnect to be called if we can establish a connection during those functions.
  • Removed handle_connect_failure entirely.