Merge pull request #691 from jeff1evesque/python_config

#676: config.py, add 'return schema' code
#692: .gitmodules, remove 'jsonmerge'
#692: .gitmodules, remove 'jsonmerge'
Merge pull request #695 from jeff1evesque/submodule_jsonmerge

#692: Remove 'jsonmerge' submodule
#693: config.py, remove 'jsonmerge_dataset' schema