relax SVN archive

Modified the module docstring, and passed in the 'tm0_grid' directory to setup_data().

Abstracted the 'tm._grid' directory to a function arg and converted the tests to 13C.

Converted all the local tm model grids to use 13C.

This is to make the testing easier.

Fix for the opt_tm0_grid.py script, the parameter values now should be sent in.

Abstracted opt_and_check() to handle all model-free models and parameter combinations.

Modified the value_test() model-free system test method to skip certain parameters if not a float or None.

Again changed an accent to the right international HTML character
in http://www.nmr-relax.com/refs.html and http://www.nmr-relax.com/features.html.

This follows a thread at:
https://mail.gna.org/public/relax-devel/2011-01/msg00026.html
(Message-id: <AANLkTinGDqGR--DkmoGXvWFpZH9mBauyqrLcXbz9Oy1-@...>)

Fix for opt_and_check(), the diffusion tensor object is called cdp.diff_tensor!

The interpreter now has echoing turned on in the model-free grid system tests.

Fix for the opt_and_check() function - the interpreter is in the module namespace.