Merge pull request #33 from ares/master

Split package2 job
remove needless old comment
move powering off of a machine from command to VM#delete method
add --delete option to ci command, deletes vm if exists
white space
remove command ip mistakingly committed in 0a3bbfe4ca4fb8c999625b033b288c5c0d1ab48a
minor improvements
Merge branch 'ares-master'

* ares-master: (3 commits)
  minor improvements
  ...
fix yum_install calls with arrays replaced with *[]
fix error when no extra package supplied

it would try to install '' package
Merge pull request #35 from ares/master

Fedora 18 support
fix execute command
add defaults --name and --vm options in build-base commands
add commands for quick machine creation

production-katello: a machine with katello in production
devel-katello: a machine with katello for development
a-machine: a machine with kvizer integrations without katello installed
Merge branch 'master' of github.com:pitr-ch/kvizer

* 'master' of github.com:pitr-ch/kvizer: (3 commits)
  Only Fedora 18 supported
  ...
don't force install by default
fix install-essentials job, add missing epel for rhel
don't pollute log with wget download progress
build under SC on rhel
auto detect virtual box version for install-guest-additions job