[OE-3939] don't destroy data in the tables before removing them
bugfix
+ [OEM-85] restore missing fields to view of cataract op notes
[OEM-95] Block down migration until complete
[OEM-95] wrote missing down migration method
Merge branch 'master' of github.com:openeyes/OphTrOperationnote

Conflicts:
	migrations/m131128_125218_remove_old_junk.php
Merge branch 'master' into develop