Add packets-per-second stats; fix muting bug

The logging for muting was broken.
Initial implementation
fix states demo
remove old code
Reiterated according to suggestion from André.
forgot semicolon as usual....
changed manifest permissions URL to the gh-pages domain
fixed short link for the extension on peer2peer
Fix video stream lost issue
cancel the timer if transitioning to active before timeout
Fix display sharing info
Merge pull request #309 from jiayliu/sharing

Fix displaying sharing info in the new signaling model
Merge pull request #306 from fippo/fix-states

states demo:
Merge pull request #304 from jiayliu/transition

Fix video stream lost issue when the remote side refreshes the page
Fix typo in downloaded
Merge pull request #307 from GoogleChrome/fixURLforDesktopextension

changed manifest permissions URL to the gh-pages domain
fixed according to comments
add util.js
rewrote average as a for loop
Merge pull request #280 from GoogleChrome/moarstats

Add packets-per-second stats; fix muting bug