relax SVN archive

ported r2634,r2636 & r2716 to the test-suite branch, corrected test_float.py

commands used
svn merge -r2633:2634 svn+ssh://varioustoxins@.../svn/relax/1.2
svn merge -r2635:2636 svn+ssh://varioustoxins@.../svn/relax/1.2
svn merge -r2715:2716 svn+ssh://varioustoxins@.../svn/relax/1.2

these changes add the ieee-754 nan/inf code, add nan catching
and change Test_float so the first unit test works.
I also tidied some conventions

Further fix of the pymol.cartoon bug

As suggested by Edward:
https://mail.gna.org/public/relax-devel/2006-10/msg00227.html

Fixed the pymol.cartoons() bug

Reported at:
https://mail.gna.org/public/relax-devel/2006-10/msg00204.html

Porting the io.file_root() function (r2719) from the 1.3 line

Command used:
snv merge -r2718:2719 svn+ssh://macraild@.../svn/relax/1.3 .

Impliments the io.file_root() function.

As suggested:
https://mail.gna.org/public/relax-devel/2006-10/msg00218.html

reconfigure for new system test and unit test framework

https://mail.gna.org/public/relax-devel/2006-10/msg00197.html

add the start of the new test suite infrastructure create unit_tests
system_tests in tests_suite, move relevant files, update relax so system
tests run and add a first (broken) unit_test

ported r2634,r2636 & r2716 to the 1.3 line

commands used
svn merge -r2633:2634 svn+ssh://varioustoxins@.../svn/relax/1.2
svn merge -r2635:2636 svn+ssh://varioustoxins@.../svn/relax/1.2
svn merge -r2715:2716 svn+ssh://varioustoxins@.../svn/relax/1.2

these changes add the ieee-754 nan/inf code and and add nan catching

tidied code and added comments, code is now 4 space indented

task 3621 https://gna.org/task/?3621

Created a branch of the 1.3 line for an overhaul of the test suite and to implement unit tests.

This is in response to the many discussions in the thread following Andrew Perry's post at
https://mail.gna.org/public/relax-devel/2006-10/msg00172.html (Message-id:
<c225763e0610292348w78ce48bfw2d0c6a41c72d0b@...>).

A good summary of the changes is given in Andrew's post at
https://mail.gna.org/public/relax-devel/2006-10/msg00192.html (Message-id:
<c225763e0610302038k55863c5ct165b68ffa4c0180c@...>).

Ported r2713 from the 'tensor_pdb' branch.

The command used was:
$ svn merge -r2712:2713 svn+ssh://bugman@.../svn/relax/branches/tensor_pdb/

This adds the text "re-run relax with the '--debug' flag" to the RelaxFault error class.