Add support for colorized output

[yafp]

What version of this package are you using?
5.0.0

What problem do you want to solve?
Making the output easier to read

What do you think is the correct solution to this problem?
Adding support for a flag like -c / --color to offer the option to generate a colorized output.

Example:

• color 1: /path/to/file
• color 2: linenumber
• color 3: reason
• color 4: rule

Are you willing to submit a pull request to implement this change?

btw: thanks for this wonderful project

[yafp]

Found the following

standard --verbose | snazzy

here.

Seems like it's a working solution for the request above.