Reorganize files in pglablib

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

pglablib/catalog/PgTablespaceContainer.cpp

@@ -0,0 +1,23 @@
+#include "PgTablespaceContainer.h"
+#include "Pgsql_Connection.h"
+#include "Pgsql_Col.h"
+#include "Pgsql_declare.h"
+#include "PgDatabaseCatalog.h"
+#include <iterator>
+
+std::string PgTablespaceContainer::getLoadQuery() const
+{
+	return
+R"__SQL__(
+SELECT oid, spcname, spcowner, spcacl, spcoptions
+FROM pg_tablespace
+)__SQL__";
+}
+
+PgTablespace PgTablespaceContainer::loadElem(const Pgsql::Row &row)
+{
+	Pgsql::Col col(row);
+	PgTablespace v;
+	col >> v.oid >> v.name >> v.owner >> v.acl >> v.options;
+	return v;
+}