relax SVN archive

Updated the description meta tag for better search engine presentation to the user.

This is for all pages of http://www.nmr-relax.com.

Small edit to the webpage http://www.nmr-relax.com/screenshots.html.

Expanded the description of the GUI screenshots on http://www.nmr-relax.com/screenshots.html.

Added Mac OS X 10.6 screenshots of the prompt UI (for http://www.nmr-relax.com/screenshots.html).

The GNU/Linux prompt UI screenshots have been updated to include a colourful background.

This is for the webpage http://www.nmr-relax.com/screenshots.html.

Fixed the ID attribute of the Bieri et al., 2011 reference.

This is for the link (http://www.nmr-relax.com/refs.html#Bieri11).

Added Windows Vista screenshots of the prompt UI (http://www.nmr-relax.com/screenshots.html).

This is using the Windows Powershell.

Emphasized the use of Python 2.7 on the download page (http://www.nmr-relax.com/download.html#MS_Windows).

Updated the copyright notice in the GUI.

Better layout of the screenshots at http://www.nmr-relax.com/screenshots.html.