Permission denied errors are now being ignored while reading the system catalog.

Other parts of the program will have to cope with the fact that not all data will
be available.

Close #4

pglablib/PgDatabaseCatalog.cpp

@@ -180,8 +180,12 @@ void load(Pgsql::Connection &conn, IPgContainter &pg_cont)
 	}
 	else {
 		auto details = result.diagDetails();
-
-		throw std::runtime_error("Query failed\n" + details.errorMessage);
+		if (details.state == "42501") { // permission denied
+			// ignore this for now
+		}
+		else {
+			throw std::runtime_error("Query failed\n" + details.errorMessage);
+		}
 	}
 
 }