title: ANTLR3 assembly missing for NHibernate
body: <p>I haven't made too many changes to my project which uses NHibernate, however now all unit tests fail for any time I use hql. I get the error "Could not load file or assembly 'Antlr3.Runtime, Version=3.1.0.39271, Culture=neutral, PublicKeyToken=3a9cab8f8d22bfb7' or one of its dependencies."</p>
  
  <p>I am still referencing the Antlr3.Runtime dll that is in the required bins directory for NHibernate version 2.1 and the properties show the correct version. Copy Local is set to True. </p>
  
  <p>I can't figure out what I may have accidentally changed. Any ideas?</p>