0.3.0 - handle ordering of int keys and values
        major update since table def changed

0.2.0 - methods added:
			namespaces() generates sorted namespace names for table
			dup() creates an identical sqldict, having create=0
			using_ns(ns) creates a copy using namespace ns
			documentation needed, se sqldict/test.py for now

0.1.1 - added namespace parameter: ns=string
        which has its own column
