This change adds some of the endpoints for listing raw
event data from the database. It does not yet support
listing events by project id.
It also fixes a problem with the MongoDB driver returning
Mongo's ObjectId instances in the results of the event
query, which makes them impossible to serialize via JSON.
Change-Id: I08d122ecd2f726fb1b2880bc22e28113f6a3aeb1
Signed-off-by: Doug Hellmann <doug.hellmann@dreamhost.com>