Merge remote-tracking branch 'origin/develop'

* origin/develop:
  case 2069 - Removed holding_available.
  case 2069 - Redundant serialization.
  case 2359 - Notices fix.
  case 2241 - Notices fix.
  case 2395 - Added proper checks.
  case 2368 - Build sane issue data, to be used as availability table for periodicals.
Release: v1.9.6
Merge branch 'master' into develop

* master:
  Release: v1.9.6