This convert_string_to_float_patch file was attached to https://gna.org/task/?6847 by Michael
Bieri (https://gna.org/users/michaelbieri), in the zip file calc_modelfree.py_patch.tar.gz
(https://gna.org/support/download.php?file_id=7750).
This function is used to read in bond length or csa values set in settings window as float values.
The following changes were made to the patch:
converttofloat was renamed to convert_to_float to match relax' standards,
''' was replaced with """ (again a relax standard),
The single space at the start of the docstring header line was removed and a full stop added
(both are needed to meet the standard),
The docstring expanded,
Comments were added and the lines with '######################' removed.
