Overview of triggers extended with function name and arguments.

Did a lot of refactoring on the catalog to keep things clean.

pglablib/PgContainer.cpp

@@ -1,2 +1,11 @@
 #include "PgContainer.h"
+#include "PgDatabaseCatalog.h"
 
+IPgContainer::IPgContainer(PgDatabaseCatalog& cat)
+	: m_catalog(cat)
+{}
+
+bool IPgContainer::minimumVersion(int required_version) const
+{
+	return m_catalog.serverVersion() >= required_version;
+}