relax SVN archive

Fix for the selection of the model-free models to be optimised.

This problem was found by Michael in the thread starting at
https://mail.gna.org/public/relax-devel/2010-02/msg00004.html (Message-id:
<4B689504.2040601@...>).

Added a shrunken version of ulysses_shadowless.png with transparency.

Expanded the relax about dialog.

This includes concepts of size, background colours, boarders, binding left click events, and
building the core of the dialog. Most code is in the base class.

Comment fix in About_base.__init__().

Converted About_relax into the About_base base class, and added About_relax which inherits from it.

Created a basic, incomplete dialog class for the 'Help -> About relax' menu entry.

The class About_relax has been added and is initialised in the GUI main class. This basic dialog
has no window decorations and automatically closes when clicked with the left mouse button.

Again the splash screen has been temporarily disabled.

This was accidentally turned back on.

Renamed the aboutrelax() method to about_relax() and added a docstring.

Name fixes for the GUI about dialog.

The function gui_bieri.about.about_relax() has been renamed to gui_bieri.about.show_about_gui() to
better reflect an action. The class method aboutGUI() has been converted to the relax convention
and is now called about_gui().

Switched back to using wx.BitmapButton rather than wx.lib.buttons.GenBitmapTextButton.

The GenBitmapTextButton button style did not match the rest of the buttons in relaxGUI.