Use Math.log since Math.log10 is experimental
Use panelsnap v0.12.0

Commits were introduced in v0.13.0 that prevents the snap
functionality on touchmove.
See:
https://github.com/guidobouman/jquery-panelsnap/commit/fca564067461b7d0924e3a9945e3cde68f3a3401
https://github.com/guidobouman/jquery-panelsnap/pull/64
Use Math.log instead of experimental log10 on histogram
Modify barchart width/height to fit on smaller screens
Set initial barchart height to config.plotHeight
Merge pull request #167 from CloudNiner/feature/disable-headroom

Fix panelsnap on touch devices