GitLab

1) Allowing the labels for the institutions graph be on mouseover

2) Restrict the number of items on graph to be 12 instead of 25

3) Allowing the weekly stats be line graphs

4) Allowing the template to override the colours for stored graph jsondata

Change-Id: Ie0b157fa1493755383b5207bc77e7b35ba140c7a
Signed-off-by: Robert Lyon <robertl@catalyst.net.nz>