incrimental changes
added Snapshot States of SKIPPED and ERROR to cover GCE needs.
folder support
fixed tests
added child folder attribute so we can navigate both directions
Add "win" to platform guess
Capability listing protocols supported by firewalls
Merge branch 'develop' of https://github.com/greese/dasein-cloud-core into develop
Merge pull request #273 from andylyall/develop

Develop