Add support for eMail obfuscator-module

Hi.

I've made a patch that adds support for the eMail obfuscator-module: http://drupal.org/project/emailobfuscator

I've edited and addad code in email_theme() and email_field_formatter_info(). And added theme_email_formatter_emailobfuscator().

This adds the same functionality as SpamSpan but with the eMail obfuscator-module instead.