The following files were copied from the repository 
https://github.com/dwaithe/FCS_point_correlator

- correlation_methods.py
- correlation_objects.py
- fitting_methods.py
- import_methods.py

The following changes were performed:
- fib4.pyx
  A doc string was inserted.
- correlation_objects.py
  Line 7 was commented out:
  #from lmfit import minimize, Parameters,report_fit,report_errors, fit_report
