relax SVN archive

Added the document-preview.png Oxygen icons.

Increased the loading state warning dialog size.

This is to accommodate for larger text on wxPython 2.9 on GNU/Linux with GTK.

Fix for the radiobutton group in the Spectral_error_type_page of the peak intensity wizard.

The first element of a RadioButton group needs the wx.RB_GROUP style!

Improved the spin data deletion messages from the spin viewer window.

Increased the dialog heights for the deletion of spin data via the spin viewer window.

Improved the user feedback during a state save by just sleeping a little to show the busy cursor.

Modified the spin loading wizard so that preloaded structures are the default.

Fix for the spin loading wizard of the spin window.

The RadioButtons of the first page for selecting the spin loading method are now fixed. With the
new 2.9.3.1 wxPython version, all options were selected. Now using the wx.RB_GROUP style, the first
option is the only one initially selected.

Fix for the about relax window.

On some GTK systems, the font is larger and hence the window will be resized to being bigger than
original hight of 600 px, resulting in the bottom of the window not being rendered.

The maths_fns.relax_fit module is now stored in the dep_check module for the info print out.