Removed WpfAnimatedGif package.

Removed WpfAnimatedGif package.  This was being used to support the clan
animated GIF inside of WPF.  However, the load performance of the clan
animated GIF made the app appear unresponsive at times.  Also, the
WpfAnimatedGif package does not have a strong name preventing me from
signing the village designer with a strong name.  I will revisit
supporting the animated GIF at a later time.