Allow to display Axis.Time labels like in Axis.Category.

Close #1130.
Merge branch 'develop' into time_pos
Export existing functionality.
Fix default pos.
Center option.
Remmove padding.
Add baseline.
Adjust padding.
Render one baseline.
Address comments.
Remove baseline and commented line.
Merge branch 'develop' into time_pos

Conflicts:
	plottable.js
	src/components/axes/timeAxis.ts
Always add end ticks.
Merge pull request #1463 from palantir/time_pos

Allow to display Axis.Time labels like in Axis.Category.