Adjust animation timings.

Switched to using exponential ease-out instead of cubic-in-out.
Un-error the build
Have travis run only node 0.10.0
animations-quicktest now uses local copy of d3.
Add correct easing to HorizontalBarRenderer.
Merge pull request #483 from palantir/adjust-animations

Adjust animations
Removed _requestedSpace from baseAxis, streamlined _doRender.
Merge branch 'master' into base-axis