change View->deleteAll to an alias of View->rmdir since rmdir works recursive

oc\preview use avconv instead of ffmpeg

Fix language selection

Conflicts:
	apps/files_encryption/lib/stream.php

This reverts commit 81a45cfc.

Use the namespaced variation of the classname.

also emit hooks for views that are a subfolder of the user folder

Fixed public upload error that prevents upload

Conflicts:
	core/lostpassword/controller.php

Clean up \OC\Util

Add previews to OC.dialogs.filepicker()

use on to add event listener instead of deprecated jquery bind

Texteditor polishing

This reverts commit 64d09452.

center utils

RGB -> HSL

Use provided mimetype on open. Fix #4696

Ocs cleanup