Reorganize files in pglablib

The enitities and containers of the catalog now go into catalog subfolder
Models go into model

pglablib/catalog/PgTriggerContainer.h

@@ -0,0 +1,28 @@
+#ifndef PGTRIGGERCONTAINER_H
+#define PGTRIGGERCONTAINER_H
+
+#include "PgContainer.h"
+#include "PgTrigger.h"
+#include <vector>
+
+namespace Pgsql {
+
+	class Result;
+
+}
+
+
+class PgTriggerContainer: public PgContainer<PgTrigger> {
+public:
+	using PgContainer<PgTrigger>::PgContainer;
+
+	virtual std::string getLoadQuery() const override;
+
+	std::vector<PgTrigger> getTriggersForRelation(Oid cls) const;
+protected:
+	PgTrigger loadElem(const Pgsql::Row &row) override;
+private:
+};
+
+
+#endif // PGTRIGGERCONTAINER_H