Position LineLabel at the centre of an area in stack configuration
Add aggregate functions to GraphCollection
Add value and percentage option to LineLabel
Allow selection of items without selecting a group
Allow selection of all items at a given position without selecting the group
Update LineLabel values on selection change
Apply stacked graph improvements to LPA graph as example
Add summary option to linelabel component
Merge branch 'master' into improve-stacked-graph
Make single stat wrapping tag configurable
Add time period label option to linelabel component
Use time period label on LPA graph
Consolidate LPA callout into generic callout
Add generic stacked graph, use for LPA graph
Bug fixes for linelabel component

- Do not show percentage when there is no valid value
- Ensure that label height is calculated correctly
- Do not pass explicit period to timeperiod view
- Call truncate method when value is not shown
- Do not render timeperiod element when not activated
- Provide default period for timeperiod element
Replace timeseries graph with stacked graph everywhere, refactor graph styles
Merge master into improve-stacked-graph
Merge pull request #194 from alphagov/improve-stacked-graph

Improve stacked graph