Use fontsquirrel compressed versions of ttfs

[cdown]

% du -b --apparent-size *.woff2 ~/git/chrisdown.name/fonts/*.ttf
18224	droid-sans-mono-webfont.woff2
14496	open-sans-bold-italic-webfont.woff2
15752	open-sans-bold-webfont.woff2
14416	open-sans-italic-webfont.woff2
15148	open-sans-webfont.woff2
31552	/home/cdown/git/chrisdown.name/fonts/droid-sans-mono.ttf
33108	/home/cdown/git/chrisdown.name/fonts/open-sans-bold-italic.ttf
35924	/home/cdown/git/chrisdown.name/fonts/open-sans-bold.ttf
32852	/home/cdown/git/chrisdown.name/fonts/open-sans-italic.ttf
34156	/home/cdown/git/chrisdown.name/fonts/open-sans.ttf

[cdown]

And fontawesome can be turned into woff2, as well.

[cdown]

May also be able to merge Open Sans into one with https://transfonter.org/.

(edit, this produces larger fonts than fontsquirrel, so only use it for fontawesome.)