ENYO-2263: revisit the given inspector "design" object to the indexer.
We want to keep the same entry name found in .design file (palette, inspector):
. object "propertyMetaData" is renamed "inspector" in the constructor,
. fix addDesign function; looking for propertyMetaData instead of inspector
Merge pull request #23 from enyojs/ENYO-2263

ENYO-2263: revisit the given inspector "design" object to the indexer.

Reviewed-By: Ben Combee (ben.combee@lge.com)