Extend createNode to deal with string fields.  Correct documentation in createNodes.  Add create_finite_element_field to list of functions with PEP8 compliant names.
Extend createNode to deal with string fields.  Correct documentation in createNodes.  Add create_finite_element_field to list of functions with PEP8 compliant names.

OpenCMISS-Bindings/opencmiss.utils