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tripgrid: A module to simulate trips and record their updates that provide the
ability to query data in Log(N) time.  The TripQuery module provides the API to
query the database for trip information.

dependencies:
- python 2.7
- rabbitmq
- celery
- redis

To run the simulator and some queries:

  - start rabbbitmq
    > sudo rabbitmq-server

  - start the redis server
    > redis-server

  - start celery app
    > celery worker --app=tripgrid -l error

  - start the simulator
    > python
    >>> import sys, tripgrid.simulator
    >>> tripgrid.simulator.main()

  Let the simulator run for a while and run some queries:
  # all trips
  python tripgrid/TripQuery.py -a --bl -90,-180 --tr 90,180

  # trips that started in grid
  python tripgrid/TripQuery.py -s --bl -90,-180 --tr 90,180

  # trips that ended in grid
  python tripgrid/TripQuery.py -e --bl -90,-180 --tr 90,180

  # trips that ran between these times
  python tripgrid/TripQuery.py -t --t0 '2014-01-14 15:09:00' --t1 "15:10:00"

  # trips that ran between these times and ended in this grid
  python tripgrid/TripQuery.py -t --t0 '2014-01-14 15:09:00' --t1 "15:10:00" -e --bl 0,0 --tr 90,180

Testing:
  - start rabbbitmq
    > sudo rabbitmq-server

  - start the redis server
    > redis-server

  - start celery app
    > celery worker --app=tripgrid -l error

  - start test driver
    > python
    >>> import sys, tripgrid.drivetest
    >>> tripgrid.drivetest.main()