Unicode ports patch

[Mike Gran]

The latest commit 'Add full Unicode capability to ports and the default
reader' 889975e51accb80491af76fc5db980aeb3edd342 adds the majority of
the functionality for non-ASCII strings.  

The commit breaks functions that have to do with locale-specific case
conversion and character-sets, and some tests will fail for the time
being.  

It is a big commit, but, it would have been hard to make it smaller, I
think.

There are some new test files in that commit that can demo the
capabilities.

Thanks,

Mike