Refactor CommandLineReporter

[AnakinRaW]

Currently the class IMO has a weak API design:

• Add a constructor overload that only gets a collection (no list required) of rules.
• Add a constructor that gets a File object, which must not be null. Throw when null.
• For compatibility reasons keep the string, List constructor (change to Collection maybe) but mark it deprecated.
• Internally the class holds an Optional<File>
• Discuss whether the File input must be a File, Directory or any of both.
  • Implement behavior where necessary.
• Create JavaDoc for all constructors.