Add ruby-tailor linting module

This pull request adds a module for `tailor` support.

We use [tailor](https://github.com/turboladen/tailor) on a project for ruby style checking, and this is how I implemented it for our project (we use [rbenv](https://github.com/sstephenson/rbenv)):

https://gist.github.com/burin/b26ca219fb39a25e39f7

I welcome any comments and feedback. I'm not too familiar with Python and the idioms, so style input is appreciated!

/cc @moubry