Upgraded to 4.0.0-rc2

[Thomas D. Dean]

Thanks for the continued code development.

I upgraded from 3.9(?)+.  The build went Ok, after In installed a couple 
support packages,
    librsvg2-bin
    icoutils

One function in the sound package shadows a core function.

> octave
GNU Octave, version 4.0.0-rc2
Copyright (C) 2015 John W. Eaton and others.
This is free software; see the source code for copying conditions.
There is ABSOLUTELY NO WARRANTY; not even for MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  For details, type 'warranty'.

Octave was configured for "x86_64-unknown-linux-gnu".

Additional information about Octave is available at http://www.octave.org.

Please contribute if you find this software useful.
For more information, visit http://www.octave.org/get-involved.html

Read http://www.octave.org/bugs.html to learn how to submit bug reports.
For information about changes from previous versions, type 'news'.

warning: function /home/tomdean/octave/audio-1.1.4/sound.m shadows a 
core library function
warning: called from
    load_packages_and_dependencies at line 47 column 5
    load_packages at line 60 column 3
    pkg at line 422 column 7
    /usr/local/share/octave/4.0.0-rc2/m/startup/octaverc at line 20 
column 1
warning: function /home/tomdean/octave/audio-1.1.4/soundsc.m shadows a 
core library function

> rm /home/tomdean/octave/audio-1.1.4/soundsc.m
> rm /home/tomdean/octave/audio-1.1.4/sound.m
eliminated these messages.

Tom Dean