Added 'Research & Knowledge Exchange' to AREA_CHOICES
Added migration to merge 'Research' and 'Knowledge Exchange' areas together
Removed 'Research' and 'Knowledge Exchange' from AREA_CHOICES
Fixed crash in migration 213
Update to latest Wagtail (which removes custom RCA styles from rich text editor) and reapply RCA styles with the new insert_editor_css hook
Merge branch 'develop'