Refactoring config, save functionality, display - DO NOT MERGE

In progress, want to see what is still failing via Travis

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 (incomplete).