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
Runchart with more than one time series & Boxplot data set generation

* Drawing of more than one line fixed
* Boxplot data set generation ignores NaNs
* Reception control boxplot uses Rec ctrl start times instead of Queue
date times
Tooltip fix for runcharts with more than one time series

* Tooltip displays all times for project regardless of time series
point selected
* Tooltip size for run charts changes dependent on amount of
information to show
Tooltip resizing for stacked bar charts & clean up of old code remnants
Updated todo
Boxplot for second time series drawn in different colour
Added styles for second time series boxplots
Minor code clean-up
Merge pull request #21 from nicjar/master

Multiple time series & tooltip as div