Converted master.js to jQuery

master.js was getting a little hard to maintain, so to make it easier to expand in the future, I converted it to use jQuery. As a result, ready.js is now no longer used.

This also fixes a few recent broken features:
* Highlighting a single column (#266)
* The feature permalink anchor

There are also a few small additions:
* The 'features implemented' count is now faintly tinted red or green corresponding to how many features are implemented.
* Additionally, there's a "bar graph" gray colouring behind the platform titles that visually denotes how many features are implemented, too:

![](http://i.imgur.com/WIiDAOY.png)
(As these are purely visual garnishes, I haven't felt the need to supply IE fallbacks for them.)
Formal jQuery collections are technically not ordered like Arrays, since by and large the DOM order of the nodes trumps their inclusion order.