relax SVN archive

Fixes for the back_calc() method.

The find_index() function was already defined (so renamed to find_ri_index()), and the analysis
specific API back_calc_ri() method was incorrectly called.

The back_calc_ri() analysis specific API method has been activated.

Shifted the model-free _back_calc() method into the analysis specific API as back_calc_ri().

This is now being called by the relax_data.back_calc() user function.

The diffusion tensor within the PDB frame can now be specified.

This avoids all Euler angle convention problems.

-This line, and those below, will be ignored--

M prompt/diffusion_tensor.py
M generic_fns/diffusion_tensor.py

Modified stitch_cone_to_edge() to use the new cone limits function.

everted the changes of relax_fit.py to original version of Edward d'Auvergne.

See http://svn.gna.org/viewcvs/relax/branches/bieri_gui/auto_analyses/relax_fit.py?rev=10687&view=log for more informations.

Reverted r10918 to restore dauvergne_protocol.py as set up by Edward d'Auvergne.

The revision was reported at: http://svn.gna.org/viewcvs/relax/branches/bieri_gui/auto_analyses/dauvergne_protocol.py?rev=10918&view=log.

Shifted the calculation of the uniform sphere point positions into angles_uniform().

This removes this replicated code from various functions, allowing for more flexibility.

Converted generate_vector_dist() to use a limit checking function and simplified the code.

The angle arrays are now returned by uniform_vect_dist_spherical_angles() so that
generate_vector_dist() can use any spherical point distribution. The max_angle arg has been changed
to limit_check so that any type of vector distribution can be created.

The limit_check() method has been added to the cone objects to determine if a point is inside or not.