relax SVN archive

Molecular dynamics by NMR data analysis

Brought to you by: edauvergne, troelslinnet

Created a new float_object argument type which is used by the 'pos' argument of structure.add_atom.

A new arg_check.float_object() function has been created to handle any float object greater than
rank-0.

Authored by: bugman 2013-02-18

changed	/trunk/arg_check.py
changed	/trunk/prompt/uf_objects.py
changed	/trunk/user_functions/structure.py