relax SVN archive

Added a new module for abstracting the relaxation data part of the BMRB API.

This should automatically handle the change from heteronucl_NOEs, heteronucl_T1_relaxation, and
heteronucl_T2_relaxation to the general_relaxation saveframe.

Added a line with the relax URL (http://nmr-relax.com) in the script docstring.

This is in case someone has the script and not relax.

Modified the full_analysis.py script to perform 500 MC sims and turned on automatic looping.

Updated the order_parameters saveframe to match the new NMR-STAR design.

The new design is described in the document attached to the post
https://mail.gna.org/public/relax-devel/2009-03/msg00019.html (Message-id:
<49B7463E.7080109@...>).

Added the new chi-squared tag.

This new tag is described in the document attached to the post
https://mail.gna.org/public/relax-devel/2009-03/msg00019.html (Message-id:
<49B7463E.7080109@...>).

Docstring fixes and the addition of the rex_frq arg to add().

Added the ID counter for the Order_param saveframe.

Docstring and comment removal of 'NOE'.

The CSA is now sent in as ppm values.

Docstring addition - CSA must be in ppm.