relax SVN archive

Ported r2850 to r2852 from the 1.3 line.

The command used was:
svn merge -r2849:2852 svn+ssh://bugman@.../svn/relax/1.3

Ported r2849 from the 1.3 line.

The commands used were:
svn merge -r2848:2849 svn+ssh://bugman@.../svn/relax/1.3
svn merge -r2848:2849 svn+ssh://bugman@.../svn/relax/1.3/test_suite/ test_suite/system_tests

The second command fixes the problem of the rearrangement of the test suite file layout.

Ported r2848 from the 1.3 line.

The command used was:
svn merge -r2847:2848 svn+ssh://bugman@.../svn/relax/1.3

Ported r2847, the merger of the 'tensor_pdb' branch, from the 1.3 line.

The commands used were:
svn merge -r2846:2847 svn+ssh://bugman@.../svn/relax/1.3
svn merge -r2846:2847 svn+ssh://bugman@.../svn/relax/1.3/test_suite/ test_suite/system_tests

The second command fixes the problem of the rearrangement of the test suite file layout.

Ported r2775 to r2844 from the 1.3 line.

The command used was:
svn merge -r2774:2844 svn+ssh://bugman@.../svn/relax/1.3

This updates the 'test_suite' branch with the 1.3 line up to the merger of the 'tensor_pdb' branch
merger.

Ported r2719 to r2743 from the 1.3 line.

The command used was:
svn merge -r2718:2743 svn+ssh://bugman@.../svn/relax/1.3

Inluded the Farrow et al., 1995 reference for the reduced spectral density mapping.

See the post at https://mail.gna.org/public/relax-users/2006-11/msg00019.html (Message-id:
<7f080ed10611292134te556ee5yaed8241fe8888dfd@...>) for more details.

Ported r2893 to r2897 from the 1.3 line.

The command used was:
svn merge -r2892:2897 svn+ssh://bugman@.../svn/relax/1.3

This includes a number of bug fixes:
Bug #7755 (https://gna.org/bugs/?7755).
Bug #7890 (https://gna.org/bugs/?7890).
Bug #7891 (https://gna.org/bugs/?7891).

The revisions also include a print out when spin systems are eliminated through the 'eliminate()'
user function.

Removed a few debugging print statements.

Fix for bug #7891 (https://gna.org/bugs/index.php?7891).

The fix was to create the 'self.relax.data.res[run][i].heteronuc' and
'self.relax.data.res[run][i].proton' data structures when reading in the model-free results file.