Features
* Add OCRA base TiQR token to authenticate by scanning
a QR code.
* Add Challenge Response authentication to Web UI
* Add 4-Eyes token, to enable two man policy. Two tokens
of two users are needed to authenticate.
* "Revoke Token" lets you perform special action on token types.
Tokens can be revoke, meaning they are blocked an can not
be unblocked anymore.
Enhancements
* Add HA information in the documentation.
* Add OpenVPN documentation.
* Add challenge response policy, to define if e.g. HOTP or TOTP are
allowed to be used in challenge response mode.
* Add hotkeys for easier use of Web Ui.
* Remove wrong system wide PassOnNoUser and PassOnNoToken.
* Set default language to "en" in Web UI.
Fixes
* Fix LDAP bug 179, which allows authentication with
wrong password under certain conditions
* Small fixes in coverage tests
* Fix username in web UI during enrollment
* Fix link to privacyIDEA logo in Web UI
* Fixed bug, that user was not able to resync his own tokens.