added date_type_t, time_type_t and timestamp, ensure allocated postgres resources are released, split repository into basic_repository and repository.

source/core/object/basic_object_info.cpp

@@ -5,16 +5,16 @@
 #include <algorithm>
 
 namespace matador::object {
-basic_object_info::basic_object_info(std::shared_ptr<repository_node> node, std::shared_ptr<class object>&& obj)
-    : object_(std::move(obj))
-    , node_(std::move(node)) {}
+basic_object_info::basic_object_info(const repository_node& node, const std::shared_ptr<class object>& obj)
+: object_(obj)
+, node_(node) {}
 
 std::type_index basic_object_info::type_index() const {
-  return node_->type_index();
+  return node_.type_index();
 }
 
 std::string basic_object_info::name() const {
-  return node_->name();
+  return node_.name();
 }
 
 std::shared_ptr<class object> basic_object_info::object() const {