dejagnu and README.snapshots obsolete?

[Thorsten Meyer]

Hi,

while looking for a place to put tests for struct array indexing I came across
comments like this in the test scripts in the test directory:

        ## Automatically generated from DejaGNU files

They confused me, because those files are managed by mercurial and no longer
automatically generated during the build process (and I had no idea what dejagnu
is and what is has to do with octave). May I suggest that we remove those 
comments?

Also there is a reference to the dejagnu framework (and other things which are
no longer valid as far as I can see) in README.snapshots. Could that file also
be removed (or replaced by a short reference to the contribution chapter in the
manual)?

regards

Thorsten