Use custom attribute instead of the div identifier

Otherwise problems arrive when a username contains characters such as an `@`

Fixes https://github.com/owncloud/user_shibboleth/issues/38

Fix cache update when doing a rename that overwrites the target

AppFramework StreamResponse

First stab at the StreamResponse, see #12988

The idea is to use an interface ICallbackResponse (I'm not 100% happy with the name yet, suggestions?) that allow the response to output things in its own way, for instance stream the file using readfile

Unittests are atm lacking, plan is to

check if a mock of ICallbackResponse will be used by calling its callback (also unhappy with this name) method
Usage is:

$response = new StreamResponse('path/to/file');

rename io to output, add additional methods and handle error and not modified cases when using StreamResponse

fix indention and uppercasing, also handle forbidden cases

fix indention

fix indention

no forbidden, figuring out if a file is really readable is too complicated to get to work across OSes and streams

remove useless import

remove useless import

fix intendation

Fix avatars in master

Add "throws" lines to calling methods and interface aswell

Add more HTTPS endpoints

Check if we have a proper fileinfo

The doc server can now finally speak SSL...

Make version check work on the lowest common version denominator

Add notice about Travis Checks

Maybe it helps in the future so we won't forget it again 🙈

Revert "Updating license headers"

apply suggestions from @atmoz to fix SFTP setup

Fix warning in filecache gc

Add default value for remote_id

Fix file move/copy when storage space is not enough

clarify link on apps management to the dev documentation

Move UTF-8 check to setup

Fixes WebDAV copy

Append search results to custom container

Add async command system to handle asynchronous operations

Remove dependency from arbitrary data object structure for easier usage