Simplify App store charts

Removes the "Advisory rating" chart, and the line chart of apps over
time. Squashes all other charts onto a single line, so they are all
on screen on initial load.
Merge 'upstream' into gh-pages-dev

Conflicts:
	js/controllers/indexController.js
	js/insightChartsControllers.js
Tidy up front-page examples

Adds titles to each chart, and formats the App price to use currency
tick format.

Imports the fix to allow axis line width/color to be changed.
Import title fix

Brings in the fix for title styling, and title padding.
Merge pull request #181 from tpkelly/gh-pages-dev

Simplify App store charts