Reorganize files in pglablib

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

pglablib/catalog/PgObject.cpp

@@ -0,0 +1,36 @@
+#include "PgObject.h"
+#include "SqlFormattingUtils.h"
+
+PgObject::PgObject(PgDatabaseCatalog& cat, Oid oid, const QString &name)
+	: m_catalog(&cat)
+	, m_oid(oid)
+	, m_name(name)
+{}
+
+PgObject::~PgObject()
+{}
+
+Oid PgObject::oid() const
+{
+	return m_oid;
+}
+
+const QString& PgObject::objectName() const
+{
+	return m_name;
+}
+
+QString PgObject::quotedObjectName() const
+{
+	return quoteIdent(objectName());
+}
+
+const PgDatabaseCatalog& PgObject::catalog() const
+{
+	return *m_catalog;
+}
+
+void test(PgObject a, PgObject b)
+{
+	a = b;
+}