[webappsec] CSP2 Implementation Report

I've put up a draft implementation report for CSP Level 2 for Chrome and
Firefox at:

https://w3c.github.io/webappsec/implementation_reports/CSP2_implementation_report.html

(note that this reflects results on my personal copy of web-platform-tests,
there are two branches that need merging to get to this state)

Edits welcome at:

https://github.com/w3c/webappsec/blob/master/implementation_reports/CSP2_implementation_report.html

And more tests to fill in the TODO sections are of course even more welcome.

We're getting closer to REC every day!

-Brad