toc update + wamp.error.option_disallowed.disclose_me rename

Hi Tobias! 
In addition to our previous issue #84, i've fixed ToC. 
And renamed wamp.error.disclose_me.not_allowed to wamp.error.option_disallowed.disclose_me. Cause i think this is more preferred variant, and for other option-specific errors we can use the same pattern.