Added Gemfile, Rakefile, and .travis.yml from katello/puppet-pulp repo.

Currently, this just runs puppet-lint on the puppet module. All changes are to fix lint warnings/errors.
Think we could add CentOS to this? I've been spending some effort on getting us working on CentOS as well. the LSB module in CentOS 6 looks like this:

(pulp)[rbarlow@notepad]~/devel/pulp% lsb_release -a
LSB Version:	:base-4.0-amd64:base-4.0-noarch:core-4.0-amd64:core-4.0-noarch
Distributor ID:	CentOS
Description:	CentOS release 6.5 (Final)
Release:	6.5
Codename:	Final