Updated note about Firefox and __proto__ restrictions

Correct behavior was implemented in https://bugzilla.mozilla.org/show_bug.cgi?id=1061853.
Added JS engine colour stripe to platform headers.

Now, platforms' table <th> elements have a thin colour strip denoting their engine. Colours have been set for Trident (IE), SpiderMonkey (Firefox/Rhino), JavaScriptCore (Safari, Phantom, WebKit), V8 (Chrome, Opera, Node), Carakan (Opera 12) and KJS (Konqueror). This allows browsers versions to be more easily visually identified, as well as providing context to e.g. the similarity of WebKit and iOS.
Merge pull request #269 from dentuzhik/gh-pages

Adds Safari 7.1 and Safari 8
Fixed bugs in Safari 7.1 commit

* The colspan of the "desktop" platform column wasn't updated.
* Added Map, Set, WeakMap and destructuring notes to Safari 7.1's
results.
Forgot to update master.js, too
Converted master.js to jQuery

All features are preserved, though some may call for optimisation.

ready.js is now no longer needed.

Also, feature totals are now coloured from red to green denoting how
many are implemented.
Merge pull request #270 from webbedspace/webkit

Fixed bugs in Safari 7.1 commit
Fixed sorting and column hovering.

Also added a visual garnish: platform header cells now have a 'bar graph' gradient background corresponding to their feature total.
Used .css() instead of making a <style> element.
Update data-es6 as well
Merge pull request #268 from webbedspace/css

Added JS engine colour stripe to platform headers.
Merge pull request #271 from webbedspace/jquery

Converted master.js to jQuery
Fix JSHint warnings — undeclared vars, semicolons, etc.
Merge pull request #265 from evilpie/patch-3

Updated note about Firefox and __proto__ restrictions
Fixed undeclared var, and added 'use strict' to master.js
Replaced the colour strip with a coloured bar graph.

This removes the thin full-colour stripe, and instead changes the background bar-graph to use a grayed version of the colours. This avoids issues where e.g. Firefox's colour/stripe clashes with the No cells' colour.
Altered the JavaScriptCore and BESEN colour-coding

BESEN is now a brown matching its broom logo. JavaScriptCore is now a tad bluer to differentiate it from the current browser bar.
Merge pull request #272 from webbedspace/enginecolours

Replace the colour strip with a coloured bar graph
Marked Firefox 24 as obsolete (ESR expired)

Firefox 24's end of life was a week ago. This also marks Firefox 31 as having ESR until late 2015.
Merge pull request #273 from webbedspace/ff24

Marked Firefox 24 as obsolete (ESR expired)