New implementation in the Glyphs plugin

[schriftgestalt]

I changed the code and UI in the Glyphs plugin quite a bit. Please feel free to port that over to RF. I don’t have RF3 to test its with and I think I changed the used API a bit (the draw() method gets the NSView as an argument. That makes it easier to get to the size of the view, so need to keep/update the self.graph_height in the controller. That could be added back if needed.

[uebele]

It seems that the buttons are not working in the Glyphs version. When I use for instance the interpolaten button, it does show an interpolated kerning value, but it doesn’t create the actual kerning pair.

[uebele]

Also the composites are not displaying