Refactoring config, save functionality, display

Removing custom nepho_config in favor of built-in Cement IConfig, but
implementing save functionality for config file. Simplifying config,
removing unneeded values and putting scope in its own section. Cleaning
up/unifying display of cloudlet/blueprint and a bit of DRY in those CLI
components.  Plumbing in config changes and breaking out param
functionality.  Setting up proper param inheritance. Allowing providers
to specify and use params with lazy-loading and other trickery.