relax SVN archive

Modularised the relax controller frame.

This will give more flexibility in modifying this GUI element, including the ability to resize the
window.

The relax controller can now survive being closed!

Closing the relax controller via the window decorations killed relaxGUI. This event is now caught
and the relax controller is hidden rather than destroyed. The controller can now be opened a second
time.

Updated the 'about relaxGUI' frame picture for the new copyrights.

Fix for the 'save' and 'save as' file actions when no file is selected.

The method action_state_save_as() now does nothing if no file was selected. This prevents a
trackback if the file selection dialog is closed without selecting a file.

Fix for the centring of the about frames.

See the thread starting at https://mail.gna.org/public/relax-devel/2010-09/msg00007.html
(Message-id: <AANLkTin3ADi0T7tnqADj-u76-cF2ndwgKswZ8Fyi5NZO@...>).

Created a directory for relax graphics. The first files here are the relax logo and icons.

Frame is hidden and not closed after click to not destroy the frame.

About dialog was converted to frame to work on Windows.

The relaxGUI controller window is converted fro a dialog to a frame for proper function in Windows.

Removed 'event.skip()' code, which may cause an event handler to get called more than once on Windows.