0.5.0 - Loads of awesomeness added, including modifyers for keys and values:
            valgetter, keymod, valmodin, valmodout
	and parameter iterate=1 which makes getitem return an iterator
	of keys.
	All these functions have working tests defined for multiple
	database engines.

0.3.1 - removed stupid _int columns in table,
		will add support for native int keys and values instead

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
