[OEM-107] Break apart theatre diary query to reduce memory usage
[OEM-107] Fix join type on active bookings relation (with needs to match relation)
[OEM-107] Fix theatre filter on diary
[OEM-107] Removed obsolete conditional from session template
+ ensure sessions loaded for theatre diary without active bookings
+ [OEM-107] Simplify diary query
+ [OEM-107] Pass ward filter through to _session view as query is now split
[OEM-74] bugfix: filter checkboxes were not being applied when generating the csv.
Merge branch 'master' into hotfix/OEM-107
Update RELEASE notes
Merge branch 'master' into develop

Conflicts:
	controllers/TheatreDiaryController.php