Merge branch 'release-2.0'
Removed once parameter.
Added beforeApply callback.
Fixed the timer bug for responsive.
Added respond method as prototype.
Bug fix on target application.
More tests.
eq instances are now available at $.fn.equalHeights.instances.
Changed default prefix to eqh
Version bumped from 2.0 to 2.0.1
Merge branch 'release-2.0.1'