Log Message:
Update to 1.21:

[Changes for 1.21 - 2012-09-20]

* Tests all green on CPAN Testers. releasing to public.

[Changes for 1.21_01 - 2012-06-22]

* Synchronize JSON::Syck with YAML::Syck version number
* Add DumpInto functions (YAML+Syck) which dump into
  a provided scalar instead of a newly allocated one
* Modify DumpFile functions to output directly to the
  specified file/filehandle instead of buffering all
  output in memory.
* Avoid modifying numbers into strings when emitting