ENYO-1851: Do not insert handler functions with invalid blank names

Enyo-DCO-1.1-Signed-off-by: Yves Del Medico <yves.del-medico@hp.com>
ENYO-1851: In designer, no longer generate properties or events with blank values

Enyo-DCO-1.1-Signed-off-by: Yves Del Medico <yves.del-medico@hp.com>
Merge pull request #191 from enyojs/ENYO-1851

ENYO-1851: Do not insert handler functions with invalid blank names