Merge pull request #4 from refinery29/master

Bump to version 0.4.1; Take INSTALL-MACOSX.md out of gemspec. Update CHANGES
Removed reference to Refinery29
Slight reorg to make "gem push" work, commenting out s.platform and s.required_ruby_version seemed to have done it.
Corrected the url to install-raptor.sh
Bumped version to 0.4.2
Update CHANGES