Refactor and docs

Refactor to improve modularity. Deal with a bunch of tech debt.

• Divide some ITS specific validation and word definition into ITS modules
• Get rid of some local configs in modules, in favor of using a reference (counted) to the global config
• Adds some tests and reduces the size of some functions
• Add detect subsystem from System ID and add it to summary report
• Only add ITS specific information to the summary if ITS was the detected subsystem
• Add example of how validation of another subsystem besides ITS could be added