port to MuseScore 3. Remove placement feature for now.

Author: lasconic

README.md

@@ -1,5 +1,5 @@
-This is a plugin for MuseScore 1.2 to add harmonica tablature notation below the notes. It currently supports
-  
+This is a plugin for MuseScore 3 to add harmonica tablature notation below the notes. It currently supports
+
  * the Hohner Highlander only, for both side, A highlander and D - [Reference](http://musescore.org/sites/musescore.org/files/Hohner%20Highlander%20scale.jpg)
  * Diatonic A - [Reference](http://harmopoint.com/harmonica-virtuel/) [and for overblows and overdraws](http://www.overblow.com/?menuid=26)
  * Diatonic Bb - [Reference](http://musescore.org/sites/musescore.org/files/Lee%20Oskar%20Diatonic%20Bb.jpg) [and for overblows and overdraws](http://www.overblow.com/?menuid=26)
@@ -20,12 +20,12 @@ If you want to have your harmonica added to the it, please contact me, or better
 * '  = halfstep bend
 * "  = whole step bend
 * "' = 3 halfsteps bend
-* +X° = overblow
-* -X° = overdraw
+* +X? = overblow
+* -X? = overdraw
 * "<" = slide
 
-Bends, over blow, over draw may be supported if it's the only way to play the note. 
-If there are two holes for one note, a choice has been made (draw) 
+Bends, over blow, over draw may be supported if it's the only way to play the note.
+If there are two holes for one note, a choice has been made (draw)
 
 ##More info
 See the official [project page](http://musescore.org/en/project/harmonicatablature)