Gftools

Changes since previous release:

- Sync fonts_public.proto with internal 629
- Support glyphspackages 630
- Update link to new GF Guide 631
- Remove mentions of apputils, fixes 41 632
- Only upgrade OS/2 tables v2+, fixes 550 636
- Skip directories from the push lists if their parent is also present 637
- Refactor binaries into packages 638
- Add fields to fonts_public.proto so we can delete upstream.yaml 639
- add-axis: do not include fallbacks 641
- qa: Use diffenator2 643
- Fix closure handling of ufomerger 647
- Stop removing the MVAR table 648

Changes since previous release:

- push: add more path transforms 625
- set protobuf to use same versions as fontbakery 626

Changes since previous release:

- Add Knowledge protos 621

Changes since previous release:

- Expose more fontmake args in the config 617

Changes since previous release:

- Clean up and fix Lang category 608
- fix: add fix_colr_font 610

Changes since previous release:

- fonts_public.proto: include primary_script field 605
- add-font: support primary_script field 606
- gen-html: Try harder to get more text 607