relax SVN archive

Shifted the relax intro string (written to STDOUT) from the interpreter module to the Info_box.

Added the -i or --info option to relax.

This causes all of the information about relax and Python to be printed by calling
Info_box.print_sys_info(). This option will be useful for determining issues with relax installs!

Changed the axis ranges for the RDC Q-factor vs. NOE Q-factor correlation plot.

Fixed the x-axis label for the scaled Q-factor vs. Q-factor correlation plot.

Completed the Stereochem_analysis.__init__() docstring, adding all the epydoc tags.

Whitespace fixes for the storage of all the Stereochem_analysis args.

The noe_norm arg is now accepted by the Stereochem_analysis class.

Scaled NOE violation correlation plots (RDC Q vs. NOE Q) are now being created.

Added an NOE normalisation variable to the stereochem_analysis.py sample script.

Fix for the write_xy_header() function for when the data_type arg is not supplied.