Add new bug report

Described bug has been observed in Chrome 23 for both Windows and Mac.
Update features-json/script-async.json

URL is outdated.
Update features-json/classlist.json

The definitions of the `classList` *Element* attribute, and the *DOMTokenList* interface, have both been moved to the DOM (Core) standard.
Update features-json/script-defer.json

URL is outdated
Update features-json/use-strict.json

Changed URL to HTML version of ECMAScript
Update features-json/getcomputedstyle.json

The CSSOM standard is the successor of DOM 2 Style.
Update features-json/getelementsbyclassname.json

`getElementsByClassName` has apparently been moved to the DOM standard.
Update features-json/mathml.json

Updated URL
Merge pull request #83 from mibalan/master

Updated the notes and support info for CSS Regions.
Merge pull request #86 from simevidas/patch-3

Update features-json/script-async.json
Merge pull request #87 from simevidas/patch-4

Update features-json/classlist.json
Merge pull request #92 from simevidas/patch-9

Update features-json/mathml.json
Merge pull request #91 from simevidas/patch-8

Update features-json/getelementsbyclassname.json
Merge pull request #90 from simevidas/patch-7

Update features-json/getcomputedstyle.json
Merge pull request #89 from simevidas/patch-6

Update features-json/use-strict.json
Merge pull request #88 from simevidas/patch-5

Update features-json/script-defer.json
Merge pull request #84 from overneath42/patch-1

Add new Chrome bug report
Update features-json/css-grid.json

Add links to webkit and mozilla bug trackers.
Merge pull request #93 from naught101/patch-1

Update features-json/css-grid.json
data update