move chef stuff out of barclamp to lib dir
a bunch of rake tasks to manage chef connection info
more engine clean up (table name, name space), move chef interactions to lib (out of model)
Merge pull request #25 from aabes/pull-req-master-a58af6e6041bae2131b4c2cf9d046f01e570b913

Merged by devtool for VictorLowther