Fix vertical slider translation direction
Add active property to slider
Merge pull request #1244 from romancortes/vertical-slider

Fix vertical slider translation direction
Remove unnecessary setter for active in slider
Add tests for slider's active property
Merge pull request #1245 from romancortes/add-active-property-to-slider

Add active property to slider
Fix issue with component tree not entering the document
Overlay enter and leave the document on show/hide
Allow activeTarget to refuse to surrender

This affords some more flexibility in manually setting the activeTarget
without worrying about disrupting the current activeTarget situation;
the activeTarget can refuse if it's undesirable.
Merge pull request #1236 from mczepiel/active-target

Allow activeTarget to refuse to surrender
Update mock dom to share EventTarget methods
Unload the overlay press composer when it isn't shown

Because it calls preventDefault even when the overlay isn't shown,
which breaks non-pressComposer/native interactions
Merge pull request #1248 from Stuk/overlay-click

Overlay press composer unload
Renamed requestAnimationFrame/cancelAnimationFrame to use unprefixed versions first
Merge pull request #1251 from HugoDaniel/requestAnimationFrame

requestAnimationFrame/cancelAnimationFrame to use unprefixed versions