Implement liszt.rb line #240 TODO: Use an actual railtie

I took a stab at implementing your TODO on this project.  I wasn't entirely clear on what direction you wanted the railtie to take and how much you wanted it to initialize/generate/etc, so I kept it as small as possible.  If you wanted to take it a different direction, I'd be happy to look into implementing it.  

Please note, this is my first attempt at implementing a railtie and my first pull request to an open source project.

Also, in full disclosure, I intend to apply for a position with academia in the coming days.  Found this project by looking into the culture of the workspace.