Add documentation to a number of files.
 - components/baseAxis.ts
 - components/legend.ts
 - components/plots/abstractBarPlot.ts
 - components/plots/areaPlot.ts
 - components/plots/horizontalBarPlot.ts
 - components/plots/verticalBarPlot.ts
 - core/broadcaster.ts
 - scales/colorScale.ts
 - scales/interpolatedColorScale.ts
Fix a test failure, I renamed a var in source but it was being any-referenced by a nefarious test
[minor] Address justin's feedback on API changes pr
Fix capitalization
Merge branch 'master' into api

Conflicts:
	plottable.d.ts
	plottable.js
Merge branch 'master' into api

Conflicts:
	plottable.d.ts
	plottable.js
Merge branch 'master' into api

Conflicts:
	plottable.d.ts
	plottable.js
Merge pull request #766 from palantir/api

Add documentation to a number of files.