Merge pull request #1493 from alphagov/fix-docs

Update permissions doc

docs/permissions.md

@@ -2,16 +2,21 @@
 
 ## Named Permissions
 
+- `signin`: as with other apps, this is the basic permission needed to access
+  the app.
 - `GDS Editor`: gives the user permission to do all actions in the app.
 
 ## Department Permissions
 
-Other permissions are based on the organisation_slug of the current user. If a user does not have the `GDS Editor` permission they will be able to:
+Other permissions are based on the organisation_slug of the current user. If a
+user does not have the `GDS Editor` permission, they will be able to:
 
-- visit the Services page `/services`, which will only show services where the current user's organisation slug is contained in the service's organisation_slugs array.
+- visit the Services page `/services`. Only services with the current user's
+  organisation slug in the service's organisation_slugs array will be visible.
 - visit the specific service pages of those services
 - download a csv of links for those services
-- download a csv of new links for those services
+- upload a csv including new links for those services
 - edit links in those services.
 
-The organisation slugs array is editable only by people with the `GDS Editor` permission.
+The organisation slugs array is editable only by people with the `GDS Editor`
+permission.