Instead of passing an int to represent time between python and C++

Instead of passing an int to represent time between python and C++
pass the tuple of python's struct_time and interpret that.
Fixes a problem where the local timezone leaked into the time
calculation.  Also fix things so that the unix, python, and RTC
data sheets all get the right time.  Provide both years since 1900
and BCD two digit year.
Put the date back at 1/1/2006 for now.

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extra : convert_revision : 473244572f468de2cb579a3dd7ae296a6f81f5d7