Changes for version 1.10
- Changed the API so that you can't change input/output formats on runtime. Supporting this was always a pain in the ass (and largely broken in 1.09).
- Now if you want two different kinds of options you need to make two serializers, not munge an existing one.
Pluggable (de-)serialization to/from compressed/uncompressed JSON/Storable/Sereal/Whatever