Remove obsolete log-config
Change return value of render methods to Object.

With Object as return value, also tec-specific query-objects may be used.
Change return value of render methods to Object.

With Object as return value, also tec-specific query-objects may be used.
Change return value of render methods to Object.

With Object as return value, also tec-specific query-objects may be used.
Add logback config files.
Remove obsolete classes.
Add ElasticSearch.