Enabled disclaimer for logged in users

See
http://beta.woltlab.com/index.php/Thread/1191-Nutzungsbestimmungen-Disclaimer/
Shows an inline spinner when searching
Update UserBulkProcessingForm.class.php

access for eventlistener
Allow icons to be framed

Since icons are images too it should be possible to use them with the `.framed` class.
added support for additional data in data exporter
Added FileReader class
Merge branch 'master' of git://github.com/WoltLab/WCF
Adds missing constant during setup
Trim whitespace from public key and private key
Re-add newline at end of TwitterAuthAction
Fixes class name
Don't allow dates prior to 1980-01-01

See WoltLab/WCF#1443

Zip doesn't support dates prior to `1980-01-01 00:00 UTC`
Sort imports in ZipWriter.class.php
Implemented possibility to set an archive comment
Merge pull request #1445 from max-m/patch-5

Don't allow dates prior to 1980-01-01
Removes unused code
Fixes indentation
Adds missing language items

Fixes #1434
Removes propagation stop if overlay is closed

This way dropdowns in overlays will automatically be closed if a overlay is closed by click.

Fixes #1442
Updating minified JavaScript files