Updated gemspec, version and CONTRIBUTORS for new non-passive release compatible with chef 11.x.x
Updated user tar upload and download to be compatible with chef 11.x.x
Updated client upload to be compatible with chef 11.x.x
Added require statement to allow cookbook upload to be compatible with chef 11.x.x
Merge pull request #4 from jdmurphy/v2.0.0-wip

Chef 11 update