relax SVN archive

A lot of bug fixes for MS Windows with the handling of the busy cursor.

All calls to wx.EndBusyCursor() are preceded by a check via wx.IsBusy(). For some reason, in
contrast to other operating systems, MS Windows will sometimes turn off the busy cursor by itself.
A subsequence call to wx.EndBusyCursor() results in an error.

Another attempt at fixing the status bar on MS Windows.

The previous fix did not work all of the time, so hopefully this one will :S

Fixed a bug on MS Windows for the 'Close all analyses' menu entry and toolbar button.

The sequence of internal events is very different on Windows compared to Mac OS X and GNU/Linux,
and not everything had been processed before everything was deleted resulting in updates to dead
GUI elements.

Updates some of the 22x22 oxygen icons which were not consistent.

Bug fix for the main window status bar on MS Windows.

The text is now being set with wx.CallAfter calls. Without this, sometimes the text would be blank.

Removed the brackets from the user function names in the RelaxError system.

This is because these make no sense in the GUI version of the user functions.

Bug fix for the new analysis wizard cancelling on Mac OS X.

A status variable is no longer returned. Instead the EndModal() dialog method is being used to
terminate modal wizards, returning the value of wx.ID_OK. The new analysis wizard is now checking
for this return code.

The main window toolbar icons are now being partly disabled with the execution lock.

Bug fix for the toolbar and status bar - they were both being assigned to self.bar!!

Added a toolbar to the main relax window with some of the most important menu entries as icons.