Remove maven, ant and pyyaml from essential packages
Parameterize essential packages
Fix a missing comma
Add python-dev, libyaml-dev to the essentials
Update README.md
Add hostname module
Pass ip address as a parameter to the hostname class
Add pkg_exists function that determine if a ubuntu package exists
Fix a typo
Add more essentials packages
Add python-software-properties into the essential list
Adopt the anchor pattern
Adopt anchor pattern
Augeas is now installed by default
Fix a typo
Install augeas before ruby binding