Adds a new SC.LinkView for creating simple programmable HTML anchors.
Updates unit test so that it should still be valid in PhantomJS environment.
Adds feature detection for new <a> attributes and uses them to prevent failing tests on other environments. Also adds the WAI-ARIA role to SC.LinkView output.
Fix crash in interpretKeyEvents.

cmd.match could return null, but was immediately being indexed. Added a
null check.
Removes an invalid condition that prevents key down validation in any browsers that support touch events (which has nothing to do with whether touch events will be used or not).
Fixed layout value warning to accept other valid layout values
Added sanity checks into grid layout computation
Fixed menu UI tests by specifying primary mouse button
Explicitly specifying mouse event pageX and pageY for drag and drop tests
Merge pull request #1234 from jameschao/layout_warning_fix

Fixes for various failing tests
Merge pull request #1230 from sproutcore/team/fairbanksg/interpret-key-events-crash

Fix crash in interpretKeyEvents.
Honor allowsMultipleSelection in SC.CollectionView.

A few keyboard functions were ignoring allowsMultipleSelection when
selecting multiple items.
SC.WorkspaceView: fix topToolbar & bottomToolbar z-index

See https://github.com/sproutcore/sproutcore/issues/1033
Make use of compass
removed z-index from popover
Removes default responder data-drag events.
Updates CHANGELOG.
HORIZONTAL_STACK and VERTICAL_STACK: when not configured with resizeToFit, let any child not specifying a fixed dimension to fill the available space. To calculate the final dimension/layout, a new property "fillAvailableSpaceRatio" is used
HORIZONTAL_STACK and VERTICAL_STACK: Add tests for fillAvailableSpaceRatio
Extensions to @mirions stacked layout changes:

- Tidies up a la jshint.
- Ensures that 100% of the available space is used up even with rounded layout values.
- Fixes a bug where a right/bottom position could be a decimal (ex. 0.25) which becomes 25% not 0.
- Adds support for maxWidth/maxHeight to constrain how much available space is used for the child view (allows following child views to use more).