remove rpm install as those packages are no longer available; print a message if there are no packages; currently supported are ubuntu and smartos
npm is no longer a separate package starting with 0.10.x and is included in the main package
support to enable legacy_packages from the 0.8.x branch in the package installation method
bump version to 1.1.0; release to the community site
updated changelog for 1.1.0
Merge pull request #31 from mdxp/legacy_packages

Legacy packages for 0.8.x support (0.10.x default for packages). Remove rpm support. Closes #30 and #19