Merge branch 'release/3.3.0' into develop
[DSI Releaser] prepare for next development iteration
Update README.md
[bennu-io] LocalFileSystemStorage once again stores the files on the file system
[bennu-core] Added ETags and Expires Headers to the local avatar endpoint
Updated CAS Client to 3.3.3
[bennu-portal] Added ETags to the logo endpoint
[scheduler-ui] Add proper error messages to the custom task UI
[core] Find User API properly states that it requires a query

  * Also added a default value for max hits
[portal] App logo will no longer be bigger than the login box
[bennu-admin] Improved the System Info interface
[io] FileDownloadServlet now uses 'sendfile' when supported
[bennu-portal] MenuFunctionality.findFunctionality now uses a cache
[DSI Releaser] prepare release v3.3.1
Merge branch 'release/3.3.1'