Add editorconfig
Add editorconfig

Introduced by #119

mohuk/mohuk.github.io,aaronisme/aaronisme.github.io,mohuk/mohuk.github.io,mohuk/mohuk.github.io,aaronisme/aaronisme.github.io,aaronisme/aaronisme.github.io,aaronisme/aaronisme.github.io,mohuk/mohuk.github.io