relax SVN archive

Proposed changes to fix bug #6503 (https://gna.org/bugs/?func=detailitem&item_id=6503) which has
been discussed within the thread starting at
https://mail.gna.org/public/relax-devel/2006-08/msg00000.html.

Made a private branch of the 1.2 line to test proposed NaN catching code.

Modified the release checklist and added an entry for updating the 'Release' field of the bug
tracker.

Updated the manual and changed the version number to 1.2.6.

relax version 1.2.6.

A quick release to fix the fatal 'devnull' ImportError (bug #6403). This bug effects those using
Python versions < 2.4 and prevents relax from starting up. The solution was to import the object
using a try statement to allow execution of the program. However if relax ever attempts to use
'devnull' a RelaxError is thrown, a message saying to upgrade to Python >= 2.4 is printed, and the
program terminates. This is currently only a problem in the test-suite.

The full list of changes is:

Features:
N/A

Changes:
N/A

Bugfixes:
* Added the missing PDB file used by one of the OpenDX tests of the relax test-suite. (bug
#6404)
* Fixed the fatal devnull import failure for Python versions < 2.4. (bug #6403)

Updated the CHANGES file for relax version 1.2.6, the fatal devnull import failure fix.

Fix to bug #6403.

The bug is located at https://gna.org/bugs/?func=detailitem&item_id=6403.

The problem is that relax will not start due to an ImportError when trying to import the object
'devnull'. The solution was to import the object using a try statement to allow execution of the
program. However if relax ever attempts to use 'devnull' a RelaxError is thrown, a message saying
to upgrade to Python >= 2.4 is printed, and the program terminates. This is currently only a
problem in the test-suite.

Added the missing PDB file used by some of the relax test-suite.

Fixed the Clore 1990 reference in the manual, changed the rsync command in the release checklist,
and updated the manual.

Updated the manual and changed the version number to 1.2.5.