Add a new function, libwebsock_init_base(), that lets you specify your own libevent event_base to use
for the websocket event loop. This makes it easier to use the library in a program that already uses
libevent for its event handling.
Add docmentation for libwebsocket_init_base()
Add libwebsock_bind_socket(), for adding an existing socket or descriptor to the ones used for incoming websocket connections.
Merge pull request #13 from shawnw/master

Add a new function, libwebsock_init_base(), that lets you specify your o...