$bundle install
/usr/local/lib/ruby/2.1.0/rubygems/dependency.rb:298:in `to_specs': Could not find 'bundler' (>= 0) among 8 total gem(s) (Gem::LoadError)
        from /usr/local/lib/ruby/2.1.0/rubygems/dependency.rb:309:in `to_spec'
        from /usr/local/lib/ruby/2.1.0/rubygems/core_ext/kernel_gem.rb:53:in `gem'
        from /usr/bin/bundle:18:in `<main>'