Move cef.go into smaller files. Create the client handler callback
functions. Create the request handler callback functions.
Add a comment, and semi-colon.
fix missing import.
Fix the free.
Partially wrap cef_request_t. Most of the getters on it work now.
Add some missing (c) headers.
Add wrapper around the cef_browser_t structure. And a partial one around
cef_browser_host_t. Add the lifespan handler.
Update License to cover my modifications. Update README to be smaller and
not direct people to the wrong support window.