Merge pull request #22 from robparrott/master

Merge experimental work for a concurrent yas3fs S3 bucket into own branch

:+1:
Building scenario parsing functions
Progress on new CLI/parsing implementation with pluggable subtasks
Additional progress on new structure
Some more cleanup and renaming
Merge branch 'master' of github.com:huit/nepho into feature/user-scenarios
removing plugin
Fix missing scenario erroring out
Moving existing scenarios out of the way temporarily
Merge branch 'master' of github.com:huit/nepho into feature/user-scenarios
capture wip changes for yas3fs integration
fix merge from upstream with yas3fs work.
Merge branch 'master' of github.com:huit/nepho into feature/user-scenarios
Moving Rob's additions out of the way
Additional cleanup, more accurate comments, starting to implement aws
provider, moving package scenario data dir to new location
stubbing out non-functional clone command, to pull down a configuration
from somewhere.  or something.
fix conflict merges
starting a single havana build for development purposes.
Merge pull request #51 from robparrott/master

starting a single havana build for development purposes.
provide a listing of CentOS images