Merge branch 'filesystem'

apps/files_sharing/appinfo/app.php

apps/files_sharing/js/share.js

apps/files_sharing/lib_share.php

apps/files_sharing/sharedstorage.php

apps/files_texteditor/ajax/loadfile.php

apps/files_texteditor/ajax/savefile.php

db_structure.xml

files/ajax/scan.php

files/ajax/upload.php

files/css/files.css

files/index.php

files/js/files.js

files/templates/index.php

files/templates/part.list.php

lib/base.php

lib/connector/sabre/directory.php

lib/filecache.php

lib/fileproxy.php

lib/fileproxy/quota.php

lib/files.php