relax SVN archive

Decreased the precision of a check in the Rx.test_r1_analysis GUI test.

This is to allow the test to pass on wxPython-Phoenix and Python 3.

Keyword to positional argument conversion for a GUI wx.BoxSizer.Clear() call.

This is for the spin containers in the spin viewer window. The keyword argument in wxPython classic
is deleteWindows however in Phoenix it is delete_windows.

Keyword to positional argument conversion for the GUI wx.ScrolledWindow.EnableScrolling() calls.

These function calls were using keyword arguments, however the old wxPython and Phoenix
documentation say that these are not keyword arguments (this must have been for backwards
compatibility with very old wxPython versions).

Keyword to positional argument conversion for the GUI wx.ListCtrl.SetStringItem() function calls.

The keyword arguments for this function must exist for backwards compatibility with ancient wxPython
versions. The current documentation lists them as positional arguments, and keyword arguments are
not accepted by wxPython-Phoenix.

Bug fix for "Tools->System information" GUI menu item.

The user function has been renamed from sys_info to system.sys_info.

Python 3 fix for the combo list sequence elements.

Comparison of integers to values of None are not allowed.

Python 3 fixes for the gui.misc module.

This is for text formatting using the "x"*num logic. In Python 3, num is often a float so this does
not work and an explicit int() function call is required.

Removal of the Mac OS X taskbar icon functionality.

This code has been disabled since its deletion back in Jun 2012 (r16772), as it does not work with
wxPython 2.8 or 2.9. However with wxPython Phoenix, the disabled code fails as there is no
wx.TaskBarIcon.

Python 3 bugfix for the Relax_disp.test_bug_24601_r2eff_missing_data system test.

Tab characters rather than spaces made the system test script unloadable in Python 3.

Clarifications and minor expansion of the release checklist document.