update scale to account for negative values and some changes to bar positioning
change attr fill of line to style fill to fix mobile bug
changes for fixing negatives
horizontal line
option for turning horizontal axis on/off
Merge branch 'feature/allow-negative-chart-vals' of github.com:thelmanews/thelma-charts into feature/allow-negative-chart-vals
add a couple lines in updateData to adjust labels and margins if they become longer
Merge pull request #7 from thelmanews/feature/allow-negative-chart-vals

Feature/allow negative chart vals