wubloader/thrimshim
Mike Lang 23ad78d592 Record in database when end time is "--"
We need this so that reverse sync reproduces these values correctly.

To handle this in the database, we have a composite type (dashed: boolean, value: timestamp).
Value is always valid and is equivalent to the old timestamp column,
but must be equal to start_time if dashed is true.

The only place we directly reference this column outside sheetsync is thrimshim, where we
always consider the value only.
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thrimshim Record in database when end time is "--"
Dockerfile Pin gevent version to work around build issues
setup.py Add bus_data DB table and have thrimshim able to query it for latest odo reading