.. remove inverse time (but add support to Model for future reference)
.. fix x labelling for plotting Work
.. remove options for best shading, its now on or off
Fixes#924
.. all the recent work on the CP chart has focused on absolute
watts and not taken into account w/kg !
.. this fixes that up, but still need to look at w/kg on the
model parameters stuff for the CP history chart
.. the last piece of the jigsaw for the CP chart refactoring was
to use the new model class and remove the calculation in CPPlot.
.. we have now removed the ridefilecache out of CP, the model calculation
and refactored to support multiple models.
.. the critical power models are now refactored to have a
base class PDModel.
.. I have implemented the 2 and 3 parameter models as well as
the veloclinic models
.. the ExtendedModel needs to be aligned
.. next steps are to put these values into a store and allow
them to be plotted on the LTM charts.
