The use of "include GeoRuby; include GeoRuby::SimpleFeatures" was
masking "include" issues in the GeoJSON and GeoRSS implementations.
By using those includes in global scope inside `spec_helper.rb`, they
altered the behaviour under `lib/`.
Sadly, simply using an include in the specs wasn't an option either, due
to changes in Ruby 1.9.3: