Update backbone and underscore dependencies, add the map files
Add missing security fixture to solve issue with non-admin users
Add missing newline at the end
Assign permission to GEM also on the layers
Force layers to be viewed only by authenticated users
Merge pull request #287 from gem/icebox-jsmap

Update backbone and underscore dependencies, add the map files
Merge pull request #288 from gem/security-fixtures

[RB] Add missing security fixture to solve issue with non-admin users
Merge branch 'master' into exposure-export-UI-changes