relax SVN archive

Updates for Python 3.0 using the Python 2to3 script.

The command used was:
2to3 -w \
-f buffer \
-f idioms \
-f set_literal \
-f ws_comma \
-x except \
-x import \
-x imports \
-x long \
-x numliterals \
-x xrange \
relax .

All files in the extern package were excluded to allow these to track upstream development in the
future.

Fix for a bug introduced in the last revision (r14810).

The RDC errors are now properly converted.

Added the ability to specify J+D verses J+2D measured RDCs.

This is to make it easier for the user so that data conversion by dividing by 2 is not needed prior
to loading into relax.

Bug fix for the logging and teeing command line options.

These are now class variables!

Bug fix for missing RDC back-calculated data (rdc_bc).

If a sequence is read from a PDB file, but the N-H bond vector cannot be extracted due to a missing
proton, the alignment tensor fit to RDC data (specifically the Monte Carlo simulations) would fail.

Modified the new test_rdc_tensor() N-state model system test to not produce files.

Created the N-state model test_rdc_tensor() system test for catching a strange RDC back calc bug.

Bug fix for a newly introduced dependency on the wxPython module.

This wx module is now optional, and only required for the GUI mode. This allows relax to run
without this module installed.

Bug fix for IO capture in the test suite with Python 2.6 or below.

The RelaxTestRunner._makeResult() replacement method has been reinstated. Replacing the class
variable resultclass does not work with earlier versions of the unittest site-package.

Bug fix for the test suite for Python 2.6 and below, introduced at r14788.

The unittest.TextTestResult class only exists in Python 2.7 and above!