Clean up
Expose axis ranges and use in mass.html
Update mass.html to 2014/09/16
Update mass to 2014/09/18
Draw grid lines dashed
Support different line styles
Update mass to 2014/09/19
Update mass to 2014/09/24
Remove superfluous optimisation with marker
Support cross marker
Support diagonal cross marker
Support array of markers
Update mass to 2014/09/26
Update mass to 2014/09/27
Rename color to lineColor
Rename line to lineStyle
Use property bag for line and marker style
Support setting marker colors