Create a module for volumetrics
Optional specification of service list for services
Show tax disc volume in vehicle license overview page
Remove line label for tax disc volumes
Add tabs for tax disc volumes
Change tax disc headline when period changes
Test for headlines
Parametrize headline with prefix
Create vehicle license volumes module
Add SORN volume graphs to vehicle excise duty
Allow queries for previous periods
Merge branch 'sorn-and-tax-disc-dashboards' into application-over-time-module

Conflicts:
	app/assets/javascripts/vehicle-excise-duty/controllers/overview.js
	app/views/vehicle-excise-duty/index.html.erb
	features/vehicle-excise-duty/dashboard.feature
Merge branch 'sorn-and-tax-disc-dashboards' into application-over-time-module
Rename headline
Merge pull request #163 from alphagov/application-over-time-module

Application over time module for Tax Disc and SORN
Add generic format-as-percentage method to Views
Request failures data for previous week
Display additional data in failures table
Merge master into expand-failures-table
Fix directory name of vehicle-licensing features