PR for Version 1.6.0.

The following changes were applied:

# Updated Merge Report

below the updated notes for this PR to include most recent changes

## PR for version 1.6.0

This new version addresses multiple changes, bug fixes and new features:

### New features
- Measure refactor for musicxml, match, midi, note array to part in #376
- Measure feature #377
- Clef feature #382
- Clef map #384 #396
- Stem direction #392 
- Support for cross staff voices in mei #397
- Improved parsing of Kern scores #413 
- Fixed import for performance pedal #399 
- Tick Units are now supported for pianoroll creation #412 
- Scores can be loaded directly for URL #404 
- Support for invisible objects in musicxml import #401 
- Support for Fingering annotations in MusicXML and MEI import/export #403 

### Bug fixes
- Corrected `get_time_maps_from_alignment` #360
- Corrected metrical strength features #364
- Corrected offsets for tied notes #366
- Fixed import issue #368
- Fixed Kern parsing #370
- Duration of Chord Notes #418 
- Corrected symbolic note duration #372
- Fixed tuplet bug #387
- Addressed sorting for enharmonic notes #407 
-  Fixes eq bug on performed notes #422
- Fixed timing-tempo change bug #427 

### Other Changes
- Added check for empty note array #361
- Improved documentation #362 #364
- Removed default voice estimation #373
- Added warning #379 
- Removed ordering in musicxml export #391
- Improved Fingering parsing in MusicXML that could result to errors #416
- Replaced Deprecated Scipy Function #417 
- Improved support for input and export in musicxml tuplet object
- New option to force add new segments #410