Support for a debian box not installed selinux-basics

On a debian box not installed `selinux-basics`, serverspec does not
work right with:

    describe selinux do
      it { should be_disabled }
    end

because `getenforce` and `/etc/selinux/config` does not exists.
Merge remote-tracking branch 'pr/217/head'
Bump up version
Omit brackets when be_permissive and be_enforcing because they cause a error when used with sudo
Merge pull request #218 from serverspec/fix-check_selinux

Omit brackets when be_permissive and be_enforcing of selinux resource type
Bump up version
Add sudo and env PATH to each command

Ref: #217
Remove the line for debug
Merge pull request #219 from serverspec/add-sudo-and-env-PATH-for-each-command

Add sudo and env PATH to each command
Bump up version
Change regular expression for adding sudo with exclamation.
Merge remote-tracking branch 'pr/220/head'
Bump up version