Spec Out Drive System PO

# On this ticket:

The purchase order for the Drive System
https://docs.google.com/spreadsheets/d/1o3tKJgGKBZYjI49TD0X10C-0oty_GoF3G0vBasRue1U/edit#gid=0

# Work:
- research what kind of motor is required
-- Encoder or analogous to know exact position of the drive motor
- select a motor with sufficient torque/speed
-- Steering wheel of 0.4 rev per second
-- Have a way to connect drive wheel to motor
- match with an ESC
-- Support the encoder system of the motor
- match with batteries
-- Drive for 10 seconds, LiPO or NiMH, do we need a special charger for it
- do preliminary research to ensure that its possible to mount a wheel to motor axle.