message: moves plunger default speeds to top of file
diff: @@ -17,6 +17,9 @@ PLUNGER_POSITIONS = {
  'drop_tip': -7
  }
  +DEFAULT_ASPIRATE_SPEED = 20
  +DEFAULT_DISPENSE_SPEED = 40
  +
  class PipetteTip:
  def __init__(self, length):
  @@ -100,8 +103,8 @@ class Pipette:
  ul_per_mm=18.51,
  trash_container=None,
  tip_racks=[],
  - aspirate_speed=20,
  - dispense_speed=40):
  + aspirate_speed=DEFAULT_ASPIRATE_SPEED,
  + dispense_speed=DEFAULT_DISPENSE_SPEED):
  self.robot = robot
  self.mount = mount
  