CRATEIT-77: Adds clear crate features
MISC: Beautifies bagit_manager.php
CRATEIT-77: Adds tests, clear crate dialog
Merge branch 'crateit-77'

Conflicts:
	apps/crate_it/templates/index.php
CRATEIT-77: Adds clear crate
MISC: Fixes typo
Merge branch 'refactor'
CRATEIT-101: Adds drag'n'drop
CRATEIT-78: Adds initial features
CRATEIT-78: Updates feature
CRATEIT-78: Adds delete crate modal
CRATEIT-101: Fixes root siblings bug
MISC: Alters classpath in response to warning messages
MISC: Completes the implementation of the Singleton pattern
CRATEIT-78: Fixes session bug for delete
CRATEIT-78: Adds check to see whether crate is empty
CRATEIT-78: Updates delete crate tests
Merge branch 'crateit-78'
MISC: Removes unused test
CRATEIT-122: Moves download zip and pub to dropdown