Restyle Bootstrap buttons
Make special thumbnail for stack views
Merge branch 'button-style'

* button-style:
  Make special thumbnail for stack views
  Restyle Bootstrap buttons
Change permissions to use enum data structure
Add HTTP API endpoints for access control
Change API to return '_id' instead of 'id'

For compatibility during the transition, 'id' is still also returned.
Simplify users and groups HTTPS API to return objects and lists directly

Other HTTP API endpoints will eventually be similarly updated.
Upgrade AngularJS to 1.2.26
Upgrade Angular UI Bootstrap to 0.11.2
Upgrade Bootstrap to 3.2.0
Add frontend for share button, including basic AngularJS app
Merge branch 'share'

* share:
  Add frontend for share button, including basic AngularJS app
  Upgrade Bootstrap to 3.2.0
  Upgrade Angular UI Bootstrap to 0.11.2
  Upgrade AngularJS to 1.2.26
  Simplify users and groups HTTPS API to return objects and lists directly
  Change API to return '_id' instead of 'id'
  Add HTTP API endpoints for access control
  Change permissions to use enum data structure
Remove debugging code writing out PTIFF metadata to a file
Merge branch 'ptiff_output'

* ptiff_output:
  Remove debugging code writing out PTIFF metadata to a file
Remove Save New session button

The server-side code remains, but this will all be removed during a
subsequent refactoring to use the RESTful API.
Merge branch 'save_new_session'

* save_new_session:
  Remove Save New session button