Add chef client/node cleanup

Enable vagrant to cleanup chef node and client from chef server.

Copies patch submitted to vagrant-aws plugin - https://github.com/tmatilai/vagrant-aws/commit/5ffb091ee139c80083ecf6208a786c6bd1d0bc25
Skeleton CreateImage
Mostly working freeze-dry except that, for now, it's the 'suspend' action!

Should be written as a command plugin and named something else.
Adds 'freezedry' top level command
Documentation and help for rackspace custom commands
Updated text, colorized ruby samples

Note: I didn't remove the Flavors section
Merge pull request #75 from maxlinc/subcommand_help

Documentation and help for rackspace custom commands
updated release.md

Updated release.md to include step on updating github releases.
Merging from upstream master
Broke out 'images' into 'images list' and 'images create'
Removed freezedry
Merge pull request #74 from elight/freeze-dry

Freeze dry
Merge pull request #67 from git-harry/chef_client_cleanup

Add chef client/node cleanup
updating cucumber rackspace_compute_url test to include tenant id
v0.1.7