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Inserts messages in right order after a stamp reset.
Adds the missing interface.

Inserts messages in right order after a stamp reset.

charset.

Fix issue about serialized size of String objects.
Use UTF-8 default to serialize String objects, allows to fix a specific
charset.

Replaces 1.1 by 1.6, note that there is a more recent version, version
3.0.1 seems to succeed version 1.6 (to be tested later).