Styles for circle changed & added new tooltip div style

* Styles for circles set in drawing code instead
* Added new tooltip div styles
Multiple time series & tooltip as div

* First attempt at drawing more than one time series in run charts
* Tooltips changed to work through a dedicated div rather than drawing
in the svgs
Added dedicated div for tooltip
Tooltip as div

* Tooltips changed to work through a dedicated div rather than drawing
in the svgs