Merge pull request #72 from ningosi/master

Tb Enrollment changes
Moved and restricted access to action methods for retiring/unretiring users
Restricted access to several action methods
Added validation to deathdate on registration form (https://www.pivotaltracker.com/s/projects/646783/stories/61802252)
Updated help dialog to make it easier to fetch help resources from outside of KenyaEMR in the future
Added "Apps" content listing to admin home page
Added support for loading help resources from an external JSON file
Updated kenyaui version to 1.13.2