relax SVN archive

Fix to bug #5660.

The bug report is located at https://gna.org/bugs/?func=detailitem&item_id=5660.

To fix the bug, a function in the base class of the specific functions has been added called
'self.has_error()'. This function checks the diffusion tensor data structures and the residue
specific data structures for error objects by looping over all objects 'object_name' and seeing if
there is a corresponding object called 'object_name' + '_err'.

The model-free results writing function now checks the 'self.has_error()' result and if successful,
then the error section is executed. The simulation section has also been modified to improve
flexibility.

Merged in revisions 2440 to 2441 of the main 1.2 line.

The command used was:
$ svn merge -r2440:2441 svn+ssh://bugman@.../svn/relax/1.2

Addition of a new test to the relax test suite.

The test creates three runs, two of which have S2 values set to 0.9 and 0.7. The difference is
calculated and assigned to the third run. If the S2 value of the third run is not ~0.2, then the
test fails.

Merged in revisions 2399 to 2437 of the main 1.2 line.

The command used was:
$ svn merge -r2399:2437 svn+ssh://bugman@.../svn/relax/1.2

Merged the change of revision 2397.

The command used was:
$ svn merge -r2395:2397 svn+ssh://bugman@.../svn/relax/1.2

Creation of a temporary branch to merge the changes from the 1.2 line into Chris MacRaild's branch.

Fix of bug #5670.

The bug report is located at https://gna.org/bugs/?func=detailitem&item_id=5670.

A single line in the self.set() function of the base class need changing by adding '* scaling'.

Bug fix #5659.

The link to the bug report is https://gna.org/bugs/index.php?func=detailitem&item_id=5659.

The problem was that the speicfic 'set()' functions were creating the objects called '*_error'
rather than '*_err'.

Completely reformatted the COMMITTERS file and added Andrew Perry to the list.

Removed the acknowledgment section of the manual.