work around inverted y axis in freetype, set glyph advance before calculating SDF
work around inverted y axis in freetype, set glyph advance before calculating SDF

mapbox/node-fontnik,mattdesl/node-fontnik,mapbox/node-fontnik,mattdesl/node-fontnik,mattdesl/node-fontnik,mattdesl/node-fontnik,mapbox/node-fontnik,mapbox/node-fontnik