Scope: Release of v0.7.0

Major release introducing new namespace, refactor of StringConvertors (thanks danmi!), fix for long-standing issues with BasicModel implementation and many other fixes both major and minor.

Next steps are continual bug-fixing and addition of the last few unit-tests for the XML/XSLT processing. Work is in progress to bring the Swing implementation to completion. Also need to complete a useful set of examples and documentation.