Version 0.3.2

1. First version of documentation:
   • basic usage of the extension
   • how to configure the extension and associated frontend content elements
   • brief information on matching accounts and how to implement/use custom resource processors
2. Support for multiple domains: the settings Callback URL is now a space-separated list, allowing to specify such a URL for any domain from which the website can be reached.
3. Authentication features configurable by resource processors. For instance local accounts can be now created for certain users only.
4. Login forms inserted via Insert Record element are now supported.
5. When selecting providers for frontend content element, those that are disabled has disabled next to their names
6. Some bugs with saving/reading configurations of resource processors are fixed.