Support for the fade articulation in fonts, and import in GP4 and GP5 formats
New mscore.ttf font file generated using an older version of FontForge
fixes for slur editing
Added cloneRange function that creates a modifiable copy of range.
Added spannerMapCopy function that creates a modifiable copy of the score spanner map.
Changed tremolo clone
Fixed ottava copy constructor to include style data
Changed two-note tremolo copy-paste.