Changelog for json-0.4.2

Version 0.4.1: released 2009-01-12; changes from 0.3.6 * Addition of extra JSON instances: - IntMap, Set, Array, IntSet * Dropped initial letter case-lowering for constructors: - Maybe's constructors are mapped to "Nothing","Just". - Either's constructors are mapped to "Left", "Right". * Ordering's are represented by their constructor names (was funky int-mapping.) * JSON.Text.Result is now an instance of MonadError; contributed by Andy Gimblett. * Included Lennart Augustsson's contributed generic JSON encoder, in Text.JSON.Generic * Optional JSON dict-mapping for Data.Map and Data.IntMap