View instances for db mapping
Merge pull request #295 from giffels/dbs3-client-url-check

Return error in case of misspelled urls
Adjust client test to new db mappings.
Merge pull request #296 from giffels/dbs3-client-test-url-fix

Adjust client test to new db mappings.
Add Server and Client tests for serverinfo api
Merge pull request #300 from giffels/dbs3-version-tests

Add Server and Client tests for serverinfo api