Link update in readme

Points to the wiki which isn't very helpful as the wiki doesn't contain much
Quick tidy up of comments in the init
Authentication passes success and failure functions as callbacks for the content delivery module
Better logs for auth success and fail
Added config skeleton for necessary parameters for authentication
v0.4.5 version bump reflecting addition of authentication callbacks

These hooks are now used by octofish v0.4.2 to drive oAuth authentication with github