Updated chrome fast forward

I've made several updates to chrome fast forward if you care to take them into the branch.  

If this is too burdensome I'd be happy to deploy it to the store and support it myself and would request your approval for the name "FastForward v2 for Chrome" if that is acceptable.

Thanks,
Damon Achey

Change description:

Converted to manifest v2.
Added debug mode.
Refactoring.

Changed the way links are searched.  New changes preserve precedence of keyword order in link searching.