Set ruby version managers to use Ruby 2.1.3
Test ruby 2.1.3 in travis
Use pry as the debug repl instead fo debugger since debugger is no longer supported on Ruby 2.x
Don't load development dependencies in travis
Don't worry about submodules
Merge pull request #6 from NYULibraries/chore/ruby-2.1.3

Chore/ruby 2.1.3