Tweaked the download cog, moved the title on the overview page above the
interval selector, swapped the colors in the sidenav to what they should
be.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	server/static/survey/lib/css/main.css
Merge remote-tracking branch 'wraithan/grid-standard-deviation'
Fetch markets in a better, faster way. Fixes #186.
Changes chart download icon to a download icon. Removes cog thing.
Fixed bug in the backend where a ValuesList could not be JSON
serialized. Added time filter stuff to the report pages.
Removing cruft.
Adds 'Average Cost over Time' timeseries chart.
Fixed more values_list bugs.
Added frequency of resources charts as per #195.
Stuff to get Bought vs. Caught occurrence graph correct.

- Spelled occurrence correctly
- Fixed bug on the backed involving difference in answers per crosstab.
Merge remote-tracking branch 'upstream/master'
You can now delete respondents from the RespondentDetail page.
Realign columns, fix for IE, cleaned up some whitespace.
Added the frequency of sales chart. Fixes #194.
Renamed this and removed a function that wasn't being called to prep for
Stray debugger call.
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Fixed expenses over time chart with new backend format.