Recurse on directories specified on the command line

[ichernev]

I noticed that -R only recurses on the current directory. Sometimes its desirable to recurse on a sub-directory.

So in this patch I try to recurse on all given directories.

I'm not sure how to run the tests / install the env so you have to check if that still works :) (or let me know how to set it up).

[lukaszkorecki]

@ichernev Hi! Thanks for the pull request!

To set yourself up you will need:

• a ruby installation
• bundler gem (install with (sudo) gem install bundler
• all dependencies - install them with bundle install --path=vendor

to run tests simply execute: bundle exec rspec in project's root directory.

I will update the readme to explain how to set the project up. So far I can see your PR didn't break anything thanks to Travis CI testing all branches :-)

[mtscout6]

While it appears that no tests were broken, I would like to see new tests showing that it works as expected.