relax SVN archive

Changed the icons for the Molecule menu entries.

This is just to improve the looks.

Modified all the other menu sub entries to include icons using the build_menu_sub_item() method.

All the oxygen icons required, as well as a 16x16 relax icon have been added to the repository.

Improved the commenting in the menu GUI element section.

Added icons to the 'File' menu items.

To do this, a new method called build_menu_sub_item() has been written to create and return an
initialised wx.MenuItem() instance, which is then appended to the menu item. The new oxygen icons
have been copied into the repository, and commenting of this menu section improved.

Changed text bottons to bitmap icons for the file opening in the model-free analysis GUI section.

This is mainly to test code manageability and design. The '+' buttons have been replaced by oxygen
bitmap icons. Note this is test code and can be reverted! Issues found are as follows:

1) The code for one GUI element is located in 3 places in the module, in 2 places in __init__()
(creation and event binding), and in __set_properties() to define sizes. This makes GUI changes
difficult.

2) The sizes in __set_properties() are hardcoded and repeated many, many times. There should be
a variable defining x and y at the start for all these buttons. These should be local variables of
a method containing the relaxation data input GUI element for model-free.

3) I can't find how to modify the size of the box for the relaxation data input?! This is visible
in the current revision. The size of this box should be defined as the sum of the x and y lengths
of all the elements (not including a margin).

Added the oxygen 16x16 shutdown icon.

Added the 16x16 document open oxygen icon.

Actually, the icons are dual licences with both CC and LGPL.

The CC text has been replaced by the LGPL text, as this is more compatible with relax's licencing.

Added the CC Attribution-ShareAlike 3.0 License.

Added some initial Oxygen (http://www.oxygen-icons.org/) icons.

These are taken from Mandriva 2010's /usr/share/icons/oxygen/ directory and are licenced unde the
Creative Common Attribution-ShareAlike 3.0 License (http://creativecommons.org/licenses/by-sa/3.0/).