feature(endorsements syndication) add tab and page for endorsements syndication
fix(endorsements controller) send http 400 when missing endorsement ids
feature(endorsement widget) implement rest of styling
feature(endorsements syndication) implement functionality to add endorsement reasons and add tests
chore(endorsement reasons manager) add tests
Merge branch 'develop' of https://github.com/lithiumtech/li-widgets into feature/NOW-223

Conflicts:
	assets/admin/js/directives/snippet-tabs/snippet-tabs.tpl.html
refactor(endorsement syndication) fixes from code review
refactor(endorsement widget) style changes
chore(endorsements): minor style tweaks
Merge pull request #64 from lithiumtech/feature/NOW-223

Feature/now 223 Endorsements Syndication