Setting default bar alignment to 0.5 instead of 0
Merge branch 'develop' into defaultBarAlignmentFactor

Conflicts:
	plottable.js
Merge branch 'develop' into defaultBarAlignmentFactor

Conflicts:
	plottable.js
Merge branch 'defaultBarAlignmentFactor' into release-v0.34.0
Merge pull request #1249 from palantir/hotfix-defaultBarAlignmentFactor

[Hotfix] - default bar alignment factor