TODO

* make certain parts of application behaviour configurable from a turtle file (what caching to do, what logging to do, where to get the api config file from)


* error message about missing properties in vocabularies should name the missing properties DONE
* fix simple json output DONE
* nicer error pages DONE
* basic caching DONE
* Cache timeout DONE
* Add format and viewer metadata
* CSS for html pages DONE/IN PROGRESS
* HTML report of config definitions - which APIs and Endpoints are in scope with current base URI,what formats and views are available, etc DONE/IN PROGRESS
* finish simple xml output DONE
* add xslt formatter DONE