Implement new bilby config parser
When asimov reads bilby config files, for example, when running unit tests, it uses the inbuild ConfigParser
in the python standard library.
Unfortunately, bilby supports syntax which does not conform to any settings understood by this parser, for example, the way in which it formats prior dictionaries, and as a result some bilby-compliant config files cannot be opened this way.
In order to read bilby config files the asimov bilby interface should directly interface with the bilby config parser, and provide the parsed data back to asimov.