[#91] Add action to list pending approvals
[#91] Frontend for pending approvals
[#91] Add action and UI to act upon pending requests
[#92] Allow download of pending files
[#91] Fix auth handling

We basically forward auth checks to the EC API (apart from the user
having to be logged in). The EC API shoud return the relevant
authoriation, and if authorized, the relevant requests to the user.
Merge branch 'master' of github.com:okfn/ckanext-glasgow