Analyst messages can't be sent prior to the first submission

[sjoqvist]

Analyst messages won't be forwarded to for example Twitter unless there has been a submission. This is because we look in the submissions table to find the maximum contest_time and use that as an approximation for the analyst message timestamp. (Messages with timestamp 0 won't be forwarded.) This is done because we don't know the start time of the contest, nor whether the contest has been frozen at some point.

The entire solution of how the timestamp is set is a hack, and it would be nice to improve it. Any ideas?