Fixes issue #36
Added delegate method to configure the width of the vertical selection bar in a line chart.
Merge pull request #37 from veducm/master

Added delegate method to configure the width of the vertical selection bar in a line chart.
Fixed comment
Clamp selection width to width of chart
Updated read me, pod spec etc for new version
Add variable dot background colors

Add two delegate methods to allow each dot on the graph to be a
different color.
Merge branch 'master' of https://github.com/alexdunn/JBChartView