Changed default pace zone scheme to match the guidelines in Dr Skiba's book "The triathletes Guide to Training with Power"
Merge pull request #1098 from amtriathlon/master

Changed default pace zone scheme
Comment for pace zones

.. just to explain how they were derived
Put SmO2 and tHb on more appropriate axis

.. as the scales were too high when shared with things like
   power and torque and made them difficult to see

.. also now color shared axis according to what are selected;
   so if only one series selected it will get that color rather
   than e.g. yLeft,0 always being red
Add Gear Ratio related functions in multiple areas
.. RideFile - add rounding approach for gear values (different roundings
depending on value) - leading to discrete GearRatio values
.. AllPlot - exclude Gear Ratio from Smoothing (to keep the discrete
value) - and change curve type to "Steps"
.. ScatterPlot - specific handling for GearRatio since values between
0.01 and 1 are relevant for GearRatio and must not be filtered out
.. RideFileChache - add Distribution Data for Gear Ratio and fix
Distribution Cache for DataSeries with > 0 decimalsFor
.. Histogram - add GearRatio to Histograms (both Rides and Trends)
Merge pull request #1100 from Joern-R/gear1

Add Gear Ratio related functions in multiple areas