Altered:
- AMEnergyToKSpaceCaclulator to be more robust with energies below the
edge energy.  It was possible to get nan's whereas it now sets it to 0
like it should.
- Made small tweaks to AM1DKSpaceCalculatorAB and registered it in
AMDatamanAppController.

Added:
- AM1DKSpaceCalculatorAB to VESPERSXASScanActionController.  It required
the addition of the energy feedback as a detector (it is now duplicated,
which is unfortunate, but oh well).

Removed:
- The k-space control from VESPERSBeamline as a separate control and
detector.  It could probably be removed from VESPERSMonochomator now
too.