relax SVN archive

Added a paragraph to http://www.nmr-relax.com/download.html about not supporting the EPD.

Added a paragraph to the installation chapter of the manual about not supporting the EPD.

Python 3 fix for the new test_suite.clean_up module.

The exceptions Python module does not exist in Python 3, so instead the relax compat.builtins object
is being used to store the WindowsError variable of None.

Epydoc docstring fix for the pipe_control.spectrum.read() function.

The text "Z_A{i}" causes problems when compiling the API documentation, so it has been changed to
"Z_Ai".

Better handling of temporary file and directory removal in the relax test suite.

The new test_suite.clean_up.deletion() function has been created from the recent method of the same
name. This is used by the tearDown() method of the system, unit, and GUI tests. It should prevent
rare MS Windows errors from appearing due to the OS not releasing a temporary file after a close()
call.

Changed the links for the Python downloads to the Python 2.7.5 release webpage.

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

Updated the Python download links from 2.7.3 to 2.7.5.

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

Updated the minimum Python version from 2.3 to 2.5 in the user manual.

Updated the Python requirement from 2.3 to 2.5 on the webpage http://www.nmr-relax.com/download.html.

An attempt at better handling MS Windows not releasing the file handle on time in the test suite.

The system and unit tests tearDown() method should now be resilient to the strange MS Windows
behaviour of not releasing the relax state files. The tearDown() method should now complete even
when this error occurs. A delay of 3 seconds has been added when the WindowsError occurs to give
the OS some time before attempting to delete the file again. If this fails, then the file deletion
operation is skipped.