Merge branch 'upstream' into gh-pages-dev
Highlight USP/Features

Adds a colorbox to the top, listing the features of the library.
Moves up the App store "Did you know?" into a colorbox next to it.
Update CSS to make the boxes match the colour scheme, with the links
and important points standing out.
Style tweaks

- Removes the max height from the colorboxes, as this caused issues with
  small windows.
- Adds an explicit padding above h2, for positioning.
- Sets margin-left on ".features li" to reduce indentation
- Underlines filter links, to differentiate from bold feature points
Tweak .features h2

Avoids downplaying the title by making it white, not light-grey (as the
rest of the text is).
Merge pull request #194 from tpkelly/gh-pages-dev

Front page tweaks