Mplsoccer

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Fixed
1) Fixed arrows so the arrows scale correctly when the dots per inches (dpi) of the figure is changed. Before the units were in dots so the arrow got smaller as the dots per inches increases. Fixed this so the arrow is in points (1/72th of an inch) so the arrow stays the same size when the dots per inch changes.

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Fixed
1) Fixed arrows legend to work in recent versions of matplotlib.

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Changed
1) changed the event_type_name/ event_type_id columns in the StatsBomb data to sub_type_name, sub_type_id.

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Changed
1) combined the StatsBomb technique columns (pass_technique, goalkeeper_technique, shot_technique) into techique_id and technique_name
2) combined the Statsbomb type columns (pass_type, duel_type_id, goalkeeper_type, shot_type) into event_type_name and event_type_id
3) removed StatsBomb columns that repeat other columns: pass_through_ball, pass_outswinging, pass_inswinging,
clearance_head, clearance_left_foot, clearance_right_foot, pass_straight, clearance_other, goalkeeper_punched_out,
goalkeeper_shot_saved_off_target, shot_saved_off_target, goalkeeper_shot_saved_to_post, shot_saved_to_post,
goalkeeper_lost_out, goalkeeper_lost_in_play, goalkeeper_success_out, goalkeeper_success_in_play, goalkeeper_saved_to_post,
shot_kick_off, goalkeeper_penalty_saved_to_post

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Changed
1) changed Pitch so axes aren't raveled when using subplots, e.g. layout=(2, 2). So colorbar can be used with subplots.

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Changed
1) changed the internal workings of bin statistics and heatmaps so the results of bin_statistic can be used for other purposes.
2) removed print function from Pitch.