Remove out-of-box support for Rails.

@jamesbrink let me know your thoughts on these changes.  I went ahead and removed support for Rails out-of-the-box so projects since most folks would rather not pull in such a large number of unnecessary dependencies.  This isn't to say that Rails is _not_ support, there's simplify some configuration left up the user:  including `pry-rails` and a Railtie for default Pry as the console.

Additionally I've bumped to version to 1.1.0, modified the CHANGELOG, and updated the README to include yourself as well as a gemfile and code climate badge.