Reorganize files in pglablib

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

pglablib/catalog/PgInheritsContainer.h

@@ -0,0 +1,22 @@
+#ifndef PGINHERITSCONTAINER_H
+#define PGINHERITSCONTAINER_H
+
+
+#include "PgContainer.h"
+#include "PgInherits.h"
+#include "Pgsql_declare.h"
+
+
+class PgInheritsContainer : public PgContainer<PgInherits, PgInherits::Key> {
+public:
+	using PgContainer<PgInherits, PgInherits::Key>::PgContainer;
+
+	virtual std::string getLoadQuery() const override;
+
+	/// Returns the parents in the correct order
+	std::vector<Oid> getParentsOf(Oid oid) const;
+protected:
+	PgInherits loadElem(const Pgsql::Row &row) override;
+};
+
+#endif // PGINHERITSCONTAINER_H