Added renderers for text/occi and app/occi+*

* Fixed MIME types
* Added custom renderers
* Added sample extensions for Occi::* classes
Added an option to force SSL in production ENV
Integrated basic Occi::Model, w/o mixins
Minor deps update, filtering on Model#show
Minor deps update, removed bt silencers in devm
Added request & response logging
Added MIME type for uri-list
Bunch of config related stuff

* Fixed loading of authN modules from config (classify => camelize)
* Fixed YAML loader
* Enabled ERB in YAML config files
Added complete set of authN dummies