Moved important bits into package for importability

[ajcollins0]

• Moved the scanning bits into a package so it can be imported by others.
• Added comments for anything exported from the tscanner package.
• Made variables that are not needed to be exported private.
• Added a verbose arg to the Scan function that will state the listening address/port if the caller needs.

I am building stuff on top of this scanner and if this logic was inside a package it will allow me (and others) to import this logic rather than fork this repo and edit things as needed. I called the package "tscanner" because "scanner" is already a part of the std lib. Thank you for the work you've done on this and I hope all is well! 🚀 🎄 🎅

[TrueSkrillor]

Thanks for coming up with this PR! While the original idea of the scanner was to be a simple console application, making it importable doesn't seem to be a bad idea.