Adding sherpa to repo
Added requirements to thunder.rb
Added sherpa dependencies to gemspec/thunder.rb
Added details and explanation to the classic 'supported unsupported extension' error
Tweaked gemspec/dependencies
raise if ENV[PWD] is not launch-kickoff. use ENV[PWD] as the working directory.
srpgo method indentation and code clean-up
Added the third reason for naming sherpa--it has the letters 'srp' in the name
Merge pull request #11 from infochimps-platform/srpgo_included_refactored

Srpgo included refactored