Added Bind DN and Bind Password fields

Also added descriptions from
http://framework.zend.com/manual/1.12/en/zend.auth.adapter.ldap.html#zen
d.auth.adapter.ldap.server-options
Updated for Omega 2.2.2

Obsolete method calls were removed.
Changed links in .ini
Updated version to 0.4.0, and fixed the link and support link in the plugin.ini
updated version in README
Merge pull request #4 from zsrlibrary/omeka-2.2.2

I have no way to test this, but I'm going to merge it in anyway. For any other further updates someone else is going to have to take over this repo.