Matthew Thomas

Closes #3 Whilst likely obvious to people from the error thrown: ``` Traceback (most recent call last): 2: from ./redis-sampler.rb:31:in `' 1: from /usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb:85:in `require' /usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb:85:in `require': cannot load such...