v0.100: Added table dumper and more columns for tables

[m4rc1e]

Dumper

When fontdiffenator performs a diff, it will create a table for each font to compare. Dumper simply returns a table for the specified font.

dumper ./path/to/font.ttf [marks, kerns, glyphs, attribs...]

It's quite useful if you need to proof all kerns or quickly check attributes within a font.

dumper ./path/to/font.ttf kerns -s

Output can be a plain table of markdown

area	string	glyph
-435760.0		.notdef
0		.null
-576910.333333	A	A
-832944.0	Æ	AE
-891748.166667	Ǽ	AEacute
-635714.5	Á	Aacute
-664194.833333	Ă	Abreve
-671934.166667	Â	Acircumflex
-636953.833333	Ä	Adieresis
-635614.583333	À	Agrave

More row info

Whilst hooking the diffenator into GFR, https://github.com/googlefonts/gfregression/pull/35. I needed a way to display more info to users. I thought adding more columns to each table was the most appropriate solution. I've added three extra columns called 'string', 'features' and 'description'.

string: Character combos used to build item being diffed. E.g for kerning 'AV' features: OT features enabled to build the string. description: string + features used E.g 'A+V | ('c2sc')

I've done a small tidy up on column names as well. For marks, I previously had "mark1' and "mark2", I've change these to "base_glyph", "mark_glyph"

[m4rc1e]

ping @davelab6.

Once merged, I'll upload it to pip.

[davelab6]

Chiaro, come Mario!