Add machine_image resource
Split create_image into allocate_image and ready_image
Get ready for action :destroy
Get idempotence and image chaining working
Fix a typo in an error message
Machine image fixes, including fixing the no-convergence convergence strategy
Docker examples, including machine image
Merge pull request #113 from opscode/machine_image_fixes

Machine image fixes
Merge pull request #110 from opscode/machine_image

Machine image