918 - StackedBar animation grows all at once

Closes #918.
Updating built files
Merge branch 'develop' into 918-betterStackedBarAnimation

Conflicts:
	plottable-dev.d.ts
	plottable.d.ts
	plottable.js
	src/components/plots/stackedBarPlot.ts
	test/tests.js
Updating animator logic
Better doc
Inlining
Changing var name
Horizontal case
Merge pull request #1128 from palantir/918-betterStackedBarAnimation

[Stacked Bar] - Better animation