Merge pull request #31 from hunner/release_0.2.0

Release 0.2.0
Ensure $dhcp_dir exists
Sysconfig dhcpd file for Red Hat based systems
Allow gateway to be unset for private networks
Merge pull request #36 from ekohl/foreman-fixes

Add patches from foreman-dhcp
Update templates to remove deprecation warnings

Signed-off-by: Konrad Scherer <Konrad.Scherer@windriver.com>
Remove deprecated concat::setup

This is deprecated in concat 1.1.0 and the Modulefile already
lists this version of concat as a dependency

Note: the README for concat says concat::setup was deprecated in
1.0.0 but the changelog lists 1.1.0.

Signed-off-by: Konrad Scherer <Konrad.Scherer@windriver.com>
Modernize module

Taking a quick pass at adding support for Travis, Puppet v3, Ruby 1.8.7,
1.9.3, and 2.0.0 and passing lint. Also specifies the version of concat
(1.1.0) and stdlib (4.1.0).