Fix the dhcp clean up for Ubuntu 12.04 or newer's postinstall.sh

For more info, please see the Launchpad issue at https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/910108
Tested reduction for memory footprint to 512MB. Updated for Fedora 18 Beta RC1.
Fix spelling error: "succesfully" --> "successfully".
adding an option to skip iso transfer
Modified Environment to pass Options hash to Providers
Initialize option parameter in Providers
Merge pull request #448 from jasonberanek/master

Modify Environment to pass Options hash to Providers
style: spacing
style: spacing the gemspec
Merge pull request #449 from miketheman/style1

style: spacing
style: spacing around commas
style: operator spacing around = {} and others
style: indentations fixes
style: whitespace and text spacing
Merge pull request #450 from miketheman/style2

Style2
Update Debian 7 templates to Beta4, and fix readline package name.
Merge pull request #452 from ergonlogic/debian7

Update Debian 7 templates to Beta4, and fix readline package name.
Tested reduction for memory footprint to 512MB. Updated for Fedora 18 Beta RC1.
Fix spelling error: "succesfully" --> "successfully".
Merge branch 'fedora-18-fixes' of git://github.com/juliandunn/veewee into fedora-18-fixes