Changes
1.1.1
Added notes to index.html concerning how I actually used this code to teach
OOIdeas in Java.  These are really just the minor details of how this code could
be viewed.  The real ideas are in the architecture of the classes.  This is only a
learning tool; even if you make perfect what is here, you still don't have much of
an editor.

1.1
Fixed use of char buffer in TXTdata.open() so that the buffer is not left dirty.
Made "TAB to edit" dependent upon TextField.hasFocus instead of dirty var.
TXTdata now takes no params.  Eliminated ref to outer frame using ghost frame.
Cancelled "open" retains current file instead of creating a new one.
Moved showLicense to data where it belongs.
Added handling of READ ONLY files.

1.0
original release