added solaris support, simplified platform version resolution to match new build list structure
added solaris support, simplified platform version resolution to match new build list structure

chef/opscode-omnitruck,chef/opscode-omnitruck,chef/opscode-omnitruck,glennmatthews/opscode-omnitruck,chef/omnitruck,glennmatthews/opscode-omnitruck,chef/omnitruck,rhass/opscode-omnitruck,juliandunn/opscode-omnitruck,rhass/opscode-omnitruck,rhass/opscode-omnitruck,juliandunn/opscode-omnitruck,chef/omnitruck,juliandunn/opscode-omnitruck,glennmatthews/opscode-omnitruck