Added two new utility functions to control object.

Enyo-DCO-1.1-Signed-off-by: Chris Patalano <chris.patalano@palm.com>
Cleaner version of getAbsoluteShowing().

Enyo-DCO-1.1-Signed-off-by: Chris Patalano <chris.patalano@palm.com>
Cleaned up the getAbsoluteBounds() function.

Enyo-DCO-1.1-Signed-off-by: Chris Patalano <chris.patalano@palm.com>
Merge pull request #237 from enyojs/controlChanges-patalano

Two utility functions for control

Reviewed-By: Ben Combee (ben.combee@lge.com)