Adding drone file
Updating drone config
Updating readme and drone file
Merge branch 'develop' of https://github.com/mdsol/mesos_cookbook into develop

Conflicts:
	README.md
Updated rubocop file with new Exclude keyword instead of deprecated
Excludes.  Also added zookeeper test cookbook that installs zk as a
package for local testing.  Test cookbook is referenced in Berksfile.
Updated default mesos version to 0.17.0.
Cleaned up files of rubocop warnings.
Added additional serverspec tests to verify working mesos master and
slave services are communicating with zookeeper and coming up properly.
Added logic to use the 13.10 deb package for 14.04 ubuntu versions until
mesosphere adds 14.04 debs.  Also cleaned up file for rubocop warnings
and updated metadata to suggest zookeeper cookbook instead of requiring
as a dependency.
Rubocop cleanup
Renamed resource due to foodcritic warning.
Added additional test cookbooks for installing a local standalone
zookeeper server for tests.  Added dependency in Berksfile.
Updated platforms for .kitchen file and updated README.
Updated Gemfile.lock to go along with the new streamlined Gemfile.
Added rake gem for travis.
Updated foodcritic to > 3.0.0 and updated Rakefile style to eventually
support cloud based testing from travis.
Updated task called by travis.
Added new style for excludes.
Best way to fix a rubocop issue is by excluding the cop.  :)
No rspec or chefspec so remove from rakefile.