Improve Documentation and TPC-H Example
V0.4.1 (#35) * Prepare next release * Docs: Improve * self.connectionmanagement['singleConnection'] optional * Docs: Improve API * K8s: Stop experiment does not delete pod * Docs: Improve API * Docs: Improve API * K8s: Script as metadata * K8s: Escape DBMS password * TPC-H: Dialect TSQL and Oracle * TPC-H: Demo config * TPC-H: Demo Exasol, OracleDB, SQLServer