relax SVN archive

Redesigned the gui_raise() function so that it is more user friendly.

The relax controller window with error message is shown first, followed by the modal RelaxError
message dialog on top of all other windows.

The spectrum.read_intensities user function now throws a RelaxError if no data was loaded.

This is to tell the user that something went wrong, and makes more sense in the GUI mode.

Another attempt at handling the pipe editor window updates.

This fixes the test suite test_load_state_no_gui() GUI test. The pipe window update needs to have
all pending wx events flushed so that the pipe window is up to date before emulating a pop up menu.

Fix for running the test suite in debugging mode.

The self.capt StringIO structure is always necessary for the final print out.

Fix for the results viewer window on MS Windows - it is no longer hidden after switching pipes.

For some reason MS Windows always brings the main GUI window to the front when pipe switches occur
(probably the notebook switching).

Bug fixes for racing in the results viewer window on MS Windows.

wx.CallAfter() calls are required for this to work on MS Windows.

MS Windows bug fix for pipe switching in the data pipe editor window.

The pipe window would be hidden after the switch!

MS Windows bug fix for the pipe editor window.

The wx.Yield() call has been removed from the update_grid() method as it causes a
wx._core.PyAssertionError on Windows.

Bug fix for racing in the GUI on MS Windows when the relax prompt window is open.

This was caught in the test suite, and only affects MS Windows. Now a wx.CallAfter() call is used
to enable the GUI element.

The GUI interpreter thread flush() method no longer hangs the thread.

The sleep calls are now outside of the interpreter thread object, avoiding the sleeping of the
thread. This was causing the test suite in MS Windows to permanently hang.