Fix issues with correct ruby-debug include for 1.8 vs. 1.9 compatibility. Also, group all development gems into a development group so jeweler will auto-generate the gemspec correctly.
We only need these gem dependencies to run the tests, not to load the gem.
Check the ruby version and conditionally add a runtime dependency on the right debugging library. Fixes errors installing gem on pre-1.9 versions of Ruby.
…only one affected, but I thought it might be worth noting.
…ce in question is not defined in the YAML file rather than ending up with a nil object that we try to replace self with