Histogram Compare Date Ranges

.. for bests, not metrics on Histogram

Still need to fixup Histogram to plot metrics
in compare mode for date ranges.
Disable Metric Histogram Compare

.. to avoid errors until we implement
   histogram metric compare date range
Histogram Compare Metric

.. the last of the histogram updates to compare date ranges
   for distribution by metric (e.g. IF for rides)
Fix Histogram SEGV and Speed

.. SEGV caused by referencing data->isChecked when
   not in range mode

.. Speed plotting broken because line setting the
   array length in setData was accidentally deleted
using milliseconds for delta_t when calculating speed, supports Suunto Ambit gpx datafiles
Histogram Golden Ratio for Zone Columns

.. taking what we did for compare mode and applying
   it to the normal zoned display.
Merge pull request #766 from Walibu/master

Using milliseconds for speed calculation, needed for Suunto Ambit gpx datafiles
Add more Suunto Ambit test rides
Fix PMC LTM SEGV

.. cut and paste error!
merge upstream into master