allow setting of GSFont.masterIndex
allow setting of GSFont.masterIndex

simoncozens/GlyphsSDK,schriftgestalt/GlyphsSDK,simoncozens/GlyphsSDK,schriftgestalt/GlyphsSDK,schriftgestalt/GlyphsSDK,simoncozens/GlyphsSDK,simoncozens/GlyphsSDK