Proposal for implementing YAML based settings files

Nothing to be merged yet, just a proposal on how to implement YAML based settings files.

- includes a conversion tool `./bin/settings2yml` to convert json settings to yaml.
- removed default settings copy so that running with not settings.yml would fail.
- ep won't not startup unless the settings.yml file is readable. This prevents users gettings their settings reset to defaults.

Please add your thoughts +/-'s

#852