(Issue #3739) apply fixed height only to T&C container
Refactor sign out button to a proper form so it can handle redirects
(Issue #3739) refactor register markup to conform to bootstrap guidelines
Added locations for error pages in Nginx configuration
Add the error pages in the UI
Implement more advanced user management in the administration UI.

- CSV Import of users
- Create new user functionality
- New `User management` navigation item that shows a list of users in the current tenant
- When a user in the list is clicked it brings up the manageuser widget that allows editing the user's profile information, password and privileges
- Added new `User management` navigation item in the global admin panel as well that shows the users in the tenant
- Added new `Maintenance` navigation item in the global admin panel
- Added the ability to create a new global administrator (sort of, initial implementation, you can create a new user on the global administration tenant and then afterwards promote it to global admin by going into the settings for the user)
- Regenerate previews
    - Reprocess specific mime types
    - Reprocess failed content previews
    - Reprocess everything in date range
    - Reprocess for a specific user
    - Reprocess all items of specific content type
- Reindex search
Move around some translations to the main bundles
Follow up on user management review
Consistency updates for progress bars, tweaks to QUnit untranslated keys test, add failure handling in the changepic widget, rename maintenance to servermaintenance
Follow up on user management review
PR Follow-up
Merge branch 'master' of https://github.com/oaeproject/3akai-ux into userManagement
Update version infographic diagram image
Fix typos in the content
Add high resolution version of the logo to support high resolution screens
Flip the expand/collapse arrow in the upload version area

Previously it was always facing down. Now it points up when the area is
expanded.
Fix the 'contact us' link color in the 'Need to pay a publisher's fee' modal.
Prevent datepicker from clearing the date when the return key is pressed
Follow up on hi-res logo in the avocetheader widget
Merge pull request #165 from timdegroote/implement-error-pages

Implement error pages