Changelog for json-0.6

If this renders badly as markdown, see the plain text version

Version 0.4.4: released 2009-01-17; changes from 0.4.2

Version 0.4.3: released 2009-01-17; changes from 0.4.2

Version 0.4.2: released 2009-01-17; changes from 0.4.1

Version 0.4.1: released 2009-01-12; changes from 0.3.6