Add rudimentary Primo hook-in

+ Add zuzak/aberprimo as a dependency.
  This is currently closed-source pending IS' approval.
+ Add AU asset location
Merge branch 'master' into primo
Add "unavailable" message for books in library

+ Add "unavailable for loan" message to books that are in the library catalogue,
  but currently taken out or reserved
Delete extraoneous examples
prune readme
Merge pull request #22 from zuzak/primo

Add Primo functionality