Initial commit.

Basic functionality.
Added initial growth charts
Make images behave responsively
Shrink logo for navbar
When changing graphs clear images and update lead

Currently the lead isn't modified when the duration is.  This patch
updates the lead to match the selected duration.  Images are also
cleared during the transition.
Change to svg output
Added loader
Changed to stacked graphs
Remove word 'breakdown'
Added initial version of domain
Sum all the totals
Force graph to draw on page load
Make buttons toggle correctly
Added better transition animation
Expose format argument
Fixed minor issue
Make sure that json can be turned on
Added support for summarising datasets
Fixed minor typo
Add NCI to growth graphs