replace generateConfigActionVerbs and generateConfigClassTypes with get-functions that return CM_Config_Node objects
evaluate class constants in array keys in CM_Config_Node::export()
implemented CM_Config_Node::exportAsString()
implemented CM_Config_Node::extendWithConfig() to recursively merge different configs
implicitly generate class types in CM_Config_Generator::getConfigClassTypes()
use new internal config generator mechanism in CM_App_Cli
generate internal config in-memory when running tests