brew_package allows list of packages
cask_package allows list of packages
Ignore errors when killing the Dock
dock add folders won't fail if no folders specified
Merge pull request #46 from ifosch/kill-Dock-failure

Dock killing failure in dashboard can fail while the playbook finishes ok
Merge pull request #44 from ifosch/cask_package-items

cask_package allows several packages to be installed
Merge pull request #43 from ifosch/brew_package_items

brew_package allows several packages to be installed
Merge pull request #47 from ifosch/dock-no-folders

dock add folders is avoided when no folders are specified.