[COOK-2499] Do not clone service resource

Signed-off-by: Seth Vargo <sethvargo@gmail.com>
[COOK-3617] Fix no method chomp on NilClass attribute errors

    The hostname/myhost/mydomain attributes try to chomp on a `nil` value, mainly the node["domain"] attribute. Additionally, || is used after a chomp, so empty string values will probably never hit the second half of the statement.

Signed-off-by: Seth Vargo <sethvargo@gmail.com>
Version bump to v3.0.2
Version bump to v3.0.3
[COOK-2551] Support creating the `sender_canonical` map file

Signed-off-by: Seth Vargo <sethvargo@gmail.com>
[COOK-3822] - Fixing up sasl_relayhost example in README

Signed-off-by: Sean OMeara <someara@opscode.com>
[COOK-3824] - Fixing up list construction in main.cf.erb

Signed-off-by: Sean OMeara <someara@opscode.com>
updating Gemfile with testing bits
cutting rubocop offenses down to 32
Version bump to v3.0.4
added virtual domain support