[Cuis] New Commit: FileDirectory finally gone!

[Juan Vuletich]

Hi Folks,

I finished the migration to FileMan. I removed the FileDirectory and 
DirectoryEntry hierarchies. I also removed a few rather ambiguous 
creation methods in StandardFileStream. Please update your packages and 
code accordingly. FileMan is so much nicer to use! Especially, prefer 
#writeStream: and #readStream:  methods, that do the close for you (even 
in the presence of errors, etc).

There might be details that still need tweaking. Let's go into a 
stabilization phase with this. When we are all happy, we can call it 
Cuis 5.0.

Cuis keeps showing us that constant cleaning and simplification enables 
this kind of deep changes and evolution. This is so much better than 
simply adding yet-another-API-for-doing-the-same-thing, as other 
Smalltalk environments are forced to do!

Cheers,
Juan Vuletich