fixing sourcemaps

closes #3186
bumping ```grunt-concat-sourcemap``` v0.4.0 -> v0.4.3
Implementation of "invite a new user" modal

Closes #3079
- new controller and template for invite-new-user-modal
- actually triggers email invite via POST /ghost/api/v0.1/users/
- setting default language value (on the client) when creating a user
- only available role is "Author" - pending 3196
- updates to UsersIndexController to allow dynamic property calculation and template rending
Add yearless date as an acceptable format for moment parsing

Closes #2331
Merge pull request #3207 from morficus/invite-new-user-modal

Implementation of "invite a new user" modal
Merge pull request #3208 from morficus/updating-grunt-contact-sourcemap

fixing sourcemaps
Fix mobile sidebar menu

Closes #3110
- Created `ApplicationView`
- Added `js-close-sidebar` classes to navbar navigation links
- Clicking on a navigation link in the sidebar will close it
Aditional classes in settings and invite user modal for the new form style
Update Ghost-UI version to 0.8.3

No issue

Adds new form styles, invite user modal and minor fixes to the user management list view
Merge pull request #3211 from novaugust/yearless-date-parsing

Add yearless date as an acceptable format for moment parsing
Merge pull request #3216 from novaugust/mobile-menu

Fix mobile sidebar menu
Merge pull request #3217 from PaulAdamDavis/new-form-style

New form styles
New HTML email template

See #3082
Merge pull request #3218 from PaulAdamDavis/master

Update Ghost-UI version to 0.8.3
Wiring up "resend" and "revoke" button on user management screen

fixes #3214
- new ```resendInvite``` method on the User model encapsulates all logic
- only sending users email address when re-inviting, since the user already exists on the back-end
- ```revoke``` calls DELETE on /ghost/api/v0.1/users/:user_id
closes #3197
- added role to user obj (only returned from the user endpoint)
- added `/users/?include=roles` and
`/users/?include=roles,roles.permissions` query parameters
- added and updated tests
Merge pull request #3220 from morficus/resend-user-invite

Wiring up "resend" and "revoke" button on user management screen
Merge pull request #3219 from JohnONolan/email

New HTML email template
Merge pull request #3221 from sebgie/issue#3197

Add role to user object
Owner has all user permissions

closes #3075
- added special treatment for role with name ‚Owner‘
Move post slug endpoint & add endpoints for users

closes #3187

- move slug endpoint to post/slug/:slug
- create similar  slug and email endpoint for users
- add/update tests