First pass at multiple config files. still a WIP.
Finish test for ConfigContainer.
Update tronfig and trond to work with multi-file configs.
Update sandbox to fix test failures.
Config state migration script to use new config, and add a migration script for old single file configs.
Update action_dag_diagram script to work with new config.
Add a header to config content when editing a named config. Allow creation of new named configs through the API.
Merge branch '189_support_multiple_config_files' of github.com:dnephin/Tron into r0.6_service_refactor