Allow white-listing files in config

[GCSBOSS]

Problem statement

In CLI, I need to only include lib/ directory of my project in both smells and metrics commands. I could set a PATH argument, but I also want to have analysis of all files in the directory, not only changed from last commit/master. But --all and [PATH] are incompatible.

Solution brainstorm (optional)

We could have an include_patterns in config for white-listing my directory instead of black-listing every other entry in my tree. Or, make --all and [PATH] work together.