Small improvements and fixes to prevent race conditions on calling th…

…e onClose function callback.

updated README

Fixed possible race condition in websocket backend (Synchronous webso…

…cket write message and write close message).

OnRead callbacks are now called in a new goroutine.

Bumb to new version

Added CheckOrigin option.

rebuild javascript client slib

Dump to new version.

websocket: removed dirty hack to fix unnecessary log messages and fix…

…ed this with the websocket close code.

- Implemented socket ClosedChan method.

- Reformatted README.