Fixes #5130.

OCS Share API

add previews to versions dialog

Added dateOnly argument to relative_modified_date

Fixed array syntax to work with PHP 5.3

Replace plus sign with space in files app URL #4932

It seems that array brackets are only supported starting with PHP 5.4.
Fixed the array brackets to be compatible and not cause a syntax error
in PHP 5.3.

DAV: Use fileinfo_cache for ETag

send mail notification if a file was shared to a user/group

Conflicts:
	apps/files/index.php
	apps/files/templates/index.php

Merge branch 'sharing_mail_notification_master' of github.com:owncloud/core into sharing_mail_notification_master

Conflicts:
	core/ajax/share.php

make it possible to prepopulate a new user home with a skeleton

LDAP modularization and tests

Encryption improved error messages

let user repeat the recovery key password to prevent typos

The message for invalid private key was too long and didn't fit in the
notification box. This fix reduces the message to fit properly by
removing the extra information.

we don't know \OCA\Encryption\Session if the encryption app is not enabled, so we have to set the status manually

Controls bar height

Added backup for config.php in autotest.sh script

Hide defaultavatar in #header and don't darken proper avatars in #header

Added default value for $fromTime to prevent missing argument errors and
keep backward compatible.

Changed method signature of relative_modified_date template method to
make it possible to add a fromTime to compare with, mostly to make it
possible to test it.

Added unit test for date and time cases.