start converting ConfigFactory, remove load methods

All of the load* methods deal with reference/application.conf classpath
stuff, so I don't think any of it is relevant.
remove systemProperties stuff from config factory

I guess this isn't python-appropriate either.
convert ConfigFactory empty and sytemEnvironment
remove ConfigFactory.parseProperties

I'm mildly confident this isn't python-relevant.
ConfigFactory: file/url parsing methods
remove ConfigFactory.parseResources...

More probably-not-useful classpath stuff.
config_factory parse_dict

This finishes the ConfigFactory conversion.
convert FromMapMode