add portage in the fail message
Add support to pass install_options in package installation
Add ability to pass different $package_name, defaults to 'r10k'
set default $package_name value per provider
cosmetics
Add yum support

Based on PR #20 by Justin Lambert <jlambert@eml.cc>
https://github.com/acidprime/r10k/pull/20
Add zypper support for SLES and openSUSE
set portage as default provider for Gentoo

note that Debian, SUSE and RedHat families didn't get default provider change
because r10k is not included in the base distro repos
Merge pull request #24 from tampakrap/package_name

Ability to pass package_name