fixes #266 Adding input validation to yaml config parser
Fixes #266 and #267 which checks yaml input for duplicate keywords
fixing the errors for issues #266 and #267
updating the called methoed in the main function of the test file
updates to make issues #266 and #267 compatible with pep8
adding module level comment to file test_yaml_parse.py for issue #266 and #267
updating ticket #267 by changing test_late_preproc_pkl method
updating ticket #267 to improve coding style
Merge pull request #705 from SinaHonari/CCW4

fixes #266 Adding input validation to yaml config parser