Rename modules to conform with PEP 8

Make module names follow the conventions of PEP 8
http://www.python.org/dev/peps/pep-0008/#naming-conventions
Rename functions and variables to conform with PEP 8

Make names of functions, variables, methods and parameters names follow the conventions of PEP 8
http://www.python.org/dev/peps/pep-0008/#naming-conventions
Merge branch 'feature/fix-naming-conventions' into develop
Add basic config file loading
Create config subcommand module

Add prototypic 'dump config' action for the config subcommand to help
with debugging
Use os.path.join() instead of manually joining paths
Add local config to .gitignore
Merge branch 'feature/read-config-files' into develop