2 new potential methods added

After last week's call, I volunteered to update the options page with the 2
new potential methods.

That task is completed now. Additionally, given that we now have 10
different potential mechanisms, I've added an in-page Table of Contents to
the Git-Hub page to make finding the options easier.

Please see:
github.com/w3c/personalization-semantics/wiki/Comparison-of-ways-to-use-vocabulary-in-content


JF

-- 
*John Foliot* | Principal Accessibility Strategist
Deque Systems - Accessibility for Good
deque.com