[Gzz] Let's NOT use serialization!!!!

[Benja Fallenstein]

You think that putting client functionality in the structure without 
having a fallback editor is bad? You think that not being able to edit 
the structure because something on the Java side has changed that 
renders the zz structure unusable is a difficult problem? You haven't 
tried to load a serialized object after making a change to one of the 
serialized classes.

Serialization may be a cool thing when you have stable code, but we can 
*not* afford not being able to make changes to our serializable classes 
because it would break loading serialized objects.

Meaning, if we want to do more than running tests with our saving 
functionality, we cannot use serialization. So, let's not!

-b.