updated apt dependency to allow more recent versions
updated the berks lock to reflect the new apt cookbook constraints
lock to stable berks >= 2
Merge pull request #130 from josephholsten/berks-2

lock to stable berks >= 2
Merge pull request #128 from buth/feature/apt_dependency

updated (very outdated) apt dependency to allow more recent versions
update kitchen for Debian 7.1.0 and Fedora