Added ng-model for validation

Fixed lint errors
Merge pull request #10 from alex-deaconu/master

Added ng-model for validation
[chore] Updating directive with optional ng-model
Merge pull request #11 from alex-deaconu/master

[chore] Updating directive with optional ng-model
changed remove icon to minus to stay consistent with RV style
Merge pull request #12 from nexus-uw/bug/change-tag-icon

changed remove icon to minus to stay consistent with RV style
[chore] gulp build wasn't run in the previous PR so, just updating the dist js files
Merge pull request #13 from Rise-Vision/chore/updating-dist

[chore] gulp build wasn't run in the previous PR so, updating dist files