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Fixes
* Fixed the ``Pitch.bin_statistic`` method so that it returns consistent binnumber results for \
the different pitch types. Now the binnumber indexing starts in the top-left hand corner \
as index 0, 0. Previously it depended on whether the pitch had an inverted y-axes whether the \
indexing started at the top or bottom left corner. This change is consistent with how indexing \
on a numpy array works (0, 0) is the top-left corner so this enables the bin statistics \
to be reconstructed from the binnumber via numpy indexing.
Changes
* Bin numbers from ``Pitch.bin_statistic`` start in the top-left corner at index 0,0.
* Statistics from ``Pitch.bin_statistic``, now mirror the horizontal pitch layout, i.e. they match \
the output from ``Pitch.label_heatmap``. The y coordinate center and edges have been flipped \
for inverted y-axis to allow this change (previously the statistic was flipped instead).