Send mail for new users

show spinner on file upload in IE8, 9

HHVM: Do not call filesize(null), this function expects a string.

filesize(null) yields an int on HHVM and thus exif_imagetype(null) is called.

Fix extra quotes in custom tags in header

Fix #12939

Fix deleting invalid s2s shares

be more explicit in JS unit tests - caused by accessibility issues

fix initial loading limit of user management on large screens

Move the Null-Byte LDAP check to the user manager

HHVM: Add workaround for missing Memcached::deleteMulti()

More accessibility fixes for Files

Improve empty states

Move basic auth login out of `isLoggedIn`

Setup a docker container that holds a webdav instance to test files_exte...

document docker parameter and use random host port
fix typo
copy autotest.sh to autotest-external.sh
adds ability to add start* and stop* scripts in env in external tests
run files_external WebDAV tests against ownCloud instance
introduce executor number to be able to shut down the correct docker container
fetch docker images in advance - this also fetches latest versions of the docker images
add second argument to autotest-external.sh which can specify a single test to run
print out the explicit test run
change naming schema of files_external setup scripts

Add isAdmin and isInGroup methods for the group manager

HHVM: Call libxml_use_internal_errors() instead of surpressing errors.

Potentially fixes https://github.com/owncloud/core/issues/12915 and opens the door for potential other bugs...

Please test very carefully, this includes:

- Testing from OCS via cURL (as in #12915)
- Testing from OCS via browser (Open the "Von Dir geteilt" shares overview)
- WebDAV
- CalDAV
- CardDAV

Add the storage id to the mount config

Propertly restore thumbnail on cancel/rename/move

In contrast to the previous solution, this also works on HHVM.