relax SVN archive

Added print out messages for when spin systems are being eliminated.

Ported r2891 from the 1.3 line.

The command used was:
svn merge -r2890:2891 svn+ssh://bugman@.../svn/relax/1.3

This fixes bug #7875 (https://gna.org/bugs/index.php?7875).

Fix for bug #7875 (https://gna.org/bugs/index.php?7875).

This bug was reported by Sebastien Morin (https://gna.org/users/semor).

The problem was that the 'model_selection()' user function was incorrectly copying the data into the
model selection run when the local tm global diffusion model was selected over the sphere, spheroid,
ellipsoid, etc. The local tm global diffusion model was being treated as a single spin system model
by the 'self.duplicate_data()' function of 'specific_fns/model_free.py' and hence only the data from
the first spin was being duplicated. By passing the 'global_data' flag in from the model selection
code, the data duplication function is now acting correctly.

initial commit of maths fns unit tests and test for the unit test framework

note: all tests are just dummy null tests (including failures)

Ported r2888 from the 1.3 line.

The command used was:
svn merge -r2887:2888 svn+ssh://bugman@.../svn/relax/1.3

This fixes bug #7863 (https://gna.org/bugs/index.php?7863).

Fix for bug #7863 (https://gna.org/bugs/index.php?7863).

This bug was reported by Sebastien Morin (https://gna.org/users/semor).

The fix was simply to set 'self.runs' to all the global diffusion models to be used by the AIC model
selection step.

Ported r2886 from the 1.3 line.

The command used was:
svn merge -r2885:2886 svn+ssh://bugman@.../svn/relax/1.3

This removes the PDF manual from the repository.

Removed the PDF user manual from the repository.

As the file is a large (2.6 Mb) binary file and changes often, it has been removed from the
repository. This should stop the relax Subversion repository getting too bign. The manual can
easily be compiled from the sources using Scons.

Ported r2884 from the 1.3 line to fix bug #7845 (https://gna.org/bugs/?7845).

The command used was:
svn merge -r2883:2884 svn+ssh://bugman@.../svn/relax/1.3

This bug was reported by Sebastien Morin (https://gna.org/users/semor) and the fix was to increase
the precision of the chi-squared value in the model-free results file.

Fix for bug #7845 (https://gna.org/bugs/?7845).

This bug was reported by Sébastien Morin (https://gna.org/users/semor).

The fix was to increase the precision of the chi-squared value in the model-free results file.