Merge pull request #136 from cpeterso/gh-pages

Firefox 32 implemented Array.from
Move ES7 tests to /es7
Add missing files
Remove some old browsers from ES7
Fix obsolete browsers checkbox
Remove some duplicated firefox entries
Add Firefox 33
Mark Firefox 30 as the current version and Firefox 25–29 as obsolete
Firefox 33 implemented Symbols (Firefox bug 645416)