adding size() to the file cache
returning the number of stored bytes in store() and adding cleanup() method
adding detection of aborted uploads
Merge branch 'master' into fixing-4546-master

Conflicts:
	lib/connector/sabre/directory.php
Merge branch 'master' into fixing-4546-master

Conflicts:
	lib/connector/sabre/directory.php
Merge branch 'master' into fixing-4546-master

Conflicts:
	lib/private/connector/sabre/directory.php
moving createFileChunked() to OC_Connector_Sabre_File
Merge branch 'master' into fixing-4546-master

Conflicts:
	lib/private/connector/sabre/file.php
Merge pull request #4867 from owncloud/fixing-4546-master

Adding detection of aborted uploads for chunked uploads