Remove slnt/ital VF axis

This removes the slant/italic variable axis and breaks up the font in two: roman and italic. This change will allow diverging designs for italic (for example single-storey a). It also addresses the fact that most software, including web browsers, doesn't handle VFs with slnt or ital well.

1 files changed, 593 insertions, 0 deletions

diff --git a/src/Inter-Italic.glyphspackage/glyphs/glottalstoprevinv.glyph b/src/Inter-Italic.glyphspackage/glyphs/glottalstoprevinv.glyph
new file mode 100644
index 000000000..36668c0c0
--- /dev/null
+++ b/src/Inter-Italic.glyphspackage/glyphs/glottalstoprevinv.glyph
@@ -0,0 +1,593 @@
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