Factor manifest_vars population into separate fn
Remove plugin enabled flag from kvm mnfst
Alignment in azure mnfst
Switch to docopt for options parsing
Add option to not log to any file.
Add provider & plugin namespace to bootstrap info
Use importlib to import providers and plugins
Depend on boto
Delete metadata plugin.
It serves a too limited purpose to be included.
Fix some task descriptions
Use bootstrapinfo module namespace when applicable
Cosmetic changes in azure provider