#hyhull-142 A HarvestingSet is no longer a required field for resources that Mixin OaiHarvestableBehaviour.  Added code to ensure that OAI_Items IDS are synced correctly. Updated specs to reflect changes.  Also enabled the ability to de-select a set within the Set tree menu.
#hyhull-131 Abstract, Description and Additional info fields now use display_text_area_field helper which displays breaks.
#hyhull-131 Removed unneeded code
Turned off parent validation for StructuralSet Root object
Merge branch 'master' of github.com:simonlamb/hyhull
UoH styles/layouts implemented
Initial work on new home page
Cleanup assets
Hyhull colour scheme introduced; modifications to home page
UI improvements; changes to home page
UI/Layout improvments
Minor layout/style fixes; Layout preparation for edit screens; New tiles on home page
Improvements to UI: HYHULL-154; HYHULL-155; HYHULL-156
Improvements to UI: HYHULL-154; HYHULL-155; HYHULL-156