Add selected property back to GridListImageItem so existing sample will continue to work

Enyo-DCO-1.1-Signed-Off-By: Ben Combee (ben.combee@lge.com)
Merge pull request #40 from enyojs/pilot-5-cleanup

rework for GridList and DataGridList

Reviewed-By: Ben Combee (ben.combee@lge.com)
API comment cleanup. Enyo-DCO-1.1-Signed-Off-By: Jim Tang (jim.tang@lge.com)
A few more API comment tweaks. Enyo-DCO-1.1-Signed-Off-By: Jim Tang (jim.tang@lge.com).
GF-12562: Add support for disabled property in GridListImageItem.
Enyo-DCO-1.1-Signed-off-by: Kevin Schaaf <kevin.schaaf@lge.com>
Merge pull request #41 from enyojs/GF-12562-kevinpschaaf

GF-12562: Add support for disabled property in GridListImageItem.

Reviewed-By: Cole Davis (cole.davis@lge.com)
Fixing http://jira2.lgsvl.com/browse/GF-11205. Adding RTL support in Fittable, readability cleanup.
Spacing cleanup

Enyo-DCO-1.1-Signed-Off-By: Ben Combee (ben.combee@lge.com)
Merge pull request #42 from enyojs/fittable_rtl

Fixing http://jira2.lgsvl.com/browse/GF-11205. Adding RTL support in Fit...

Reviewed-By: Ben Combee (ben.combee@lge.com)
fix invalid mixin

Enyo-DCO-1.1-Signed-off-by: Cole Davis <cole.davis@lge.com>