Timezone

Same than antoine, but with rebase of dev
yes it is a very ugly and dumb solution but unfortunately the tz db is not supported by boost::date_time (it is done with boost::locale but we don't want to pay the cost of this module).

boost::date_time can only be fed with a csv or with code.
We don't want to bother the delivery of the file with the binary so we are stuck with the hardcoding of the timezone data (we'll add it to the binary...)

I'm not proud at all of this solution, but I don't see any other means apart from changing boost to read the tz db (we'll see if we can manage some time to do that in the future).

Do you see an alternative ?