150-slit-test.py: can close and open gap under ecmc
A summary of many small commits: AxisUtil.py: Wait for waitForNotMoving()
AxisEPICS.py: Add getAcceleration(), getDeceleration(), getHomedStatus(), moveVelocity(), getExecuteStatus(), getVelocity()
AxisCreator.py: Support for EPICS slits
AxisADS: moveVelocity() needs a direction