exclude Berksfile from rubocop
fix indenting cops
update chefspec to 4.1.1
quote mode specification of login_defs
add spec for login_defs
make UID_MIN and GID_MIN in login.defs configurable via attributes
Merge pull request #62 from bkw/uid_min+gid_min

make uid_min and gid_min of login.defs configurable