switched out the border-radius powered query_color_dot's with font-awesome icons to maintain IE compatibility
moved the adition of the start and end time of the series after the reduce function checks each data point from elastic search. This whould resolve #422
Zero-filling will now happen any time there is more than one query being plotted, even if that there is only one data point
in the series.
Merge pull request #438 from spenceralger/zero-filled-ts

Zero filled ts
Merge pull request #437 from spenceralger/responsive-tooltip

kbn.query_color_dot() shouldn't use border-radius