Add note_bioghist to agents and introduce new note_citation, note_outline and note_abstract
Setup note_outline to create a level/item hierarchy rather than using a content textarea
updated EAC import and export to use the new notes structure
Add a selenium test for Agent notes and outline sub note
Merge pull request #330 from hudmol/44678103-agent-notes

[Delivers #44678103] Add bioghist note to agent records