Changelog for HsSyck-0.50

[Changes for 0.50 - 2011-03-19] * parseYaml and emitYaml now work with Unicode Strings. Reported by: voker57 [Changes for 0.45 - 2009-05-15] * Require Cabal 1.2.3+ to work with GHC 6.10 and above. * Change unsafe ByteString packing to safe packing to avoid memory corruption. Contributed by: Nicolas Pouillard [Changes for 0.44 - 2008-06-21] * Tested against GHC-6.8.3; added the Pugs category; no functional changes. [Changes for 0.43 - 2008-06-21] * Properly documented the language extensions we use in the .cabal file. * No longer compiles with -O2 as Cabal automatically adds -O anyway. [Changes for 0.41 - 2008-02-19] * Update the ByteString function calls for the ByteStrings packaged with GHC 6.8.2 (and up). Improve Cabal metadata. Contributed by: Gwern Branwen [Changes for 0.4 - 2007-06-16] * Add Haddock documentations; no functional changes. Contributed by: Jaap Weel [Changes for 0.3 - 2007-05-21] * First working Hackage release: Unbreak the build by adding missing extra-source-files. Requested by: Bryan O'Sullivan