now empty list validation uses bootstrap alert-warning, not js alert. moreover, alerts are no longer data-dismiss, but data-hide (i.e. they can be reused multiple times as they're not removed from the page when closed)
data-hide for errors only. better not touch the rest ;)
Set the default xMin value for the charts.
Merge pull request #30 from alexdown/master

better looking error message when trying to add empty lists
Merge pull request #31 from jeffnuss/minX-chart-tweak

Set the default xMin value for the charts.