If the Ruby binary isn't available, compile it
Merge pull request #28 from seanclerkin/master

If the Ruby binary isn't available, compile it
Move to Ruby 2.1.5 and remove RVM
Explicitly set the locale
Remove all gem sources and replace with https://rubygems.org/
Merge pull request #30 from seanclerkin/master

Move to Ruby 2.1.5 and remove RVM