Rename font/ => fonts/

First suggested by https://mathquill.slack.com/archives/mathquill/p1486494860000902

It's definitely the consensus:
KaTeX
  https://github.com/Khan/KaTeX/tree/f3df1ccbac4c61efd55bec423bc8509f8d173fb2/static/fonts
MathJax
  https://github.com/mathjax/MathJax/tree/6273842a9746731b9ecca0de18ec9fd50a36df99/fonts
FontAwesome
  https://github.com/FortAwesome/Font-Awesome/tree/04dad1e192b129ab09cddcd9b1aefb8b189c8d79/fonts
materialize
  https://github.com/Dogfalo/materialize/tree/189722c9cac812f5e9b3b05299298e8d4e90d7c5/fonts
a blogpost on React-Meteor
  https://medium.com/@abhaytalreja/custom-fonts-in-react-meteor-app-ebe2a7fc7a2b#.43mnzbxaj
clinical-meteor
  https://github.com/clinical-meteor/fonts

It's even the consensus for Rails and Django:
react_on_rails "recommended project structure"
  https://github.com/shakacode/react_on_rails/blob/9483bf8aaa2610a0ba5c5f04a551001f99589b0d/docs/additional-reading/recommended-project-structure.md#directory-structure
"Custom Web Fonts and the Rails Asset Pipeline": "The recommended way"
  https://gist.github.com/anotheruiguy/7379570#the-recommended-way
"Ultimate Django"
  https://ultimatedjango.com/learn-django/lessons/serving-static-files/
someone on stackoverflow "Best practice for Django project working
directory structure"
  http://stackoverflow.com/a/35244323/362030

Author: laughinghan

.gitattributes

@@ -2,4 +2,4 @@
 * text=lf
 
 # don't mess with fonts
-src/font/* text=binary
+src/fonts/* text=binary

docs/Contributing.md

@@ -8,7 +8,7 @@ For developing on MathQuill, run `make dev`. This will skip minifying MathQuill,
 
 `make basic` builds a stripped-down version of MathQuill for basic mathematics, without advanced LaTeX commands. This version doesn't allow typed LaTeX backslash commands with `\` or text blocks with `$`, and also won't render any LaTeX commands that can't by typed without `\`. This version of MathQuill's JS is only somewhat smaller, but the font is like 100x smaller.
 
-To run this smaller version, serve and load `mathquill-basic.{js,min.js,css}` and `font/Symbola-basic.{eot,ttf}` instead.
+To run this smaller version, serve and load `mathquill-basic.{js,min.js,css}` and `fonts/Symbola-basic.{eot,ttf}` instead.
 
 # Testing
 

package.json

@@ -9,7 +9,7 @@
   },
   "files": [
     "build/mathquill.{css,js,min.js}",
-    "build/font/Symbola.*",
+    "build/fonts/Symbola.*",
     "quickstart.html"
   ],
   "devDependencies": {

src/css/font.less

@@ -9,24 +9,24 @@
 
 @basic:;
 .font-srcs() when not (@basic) {
-  src: url(font/Symbola.eot);
+  src: url(fonts/Symbola.eot);
   src:
     local("Symbola Regular"),
     local("Symbola"),
-    url(font/Symbola.woff2) format("woff2"),
-    url(font/Symbola.woff) format("woff"),
-    url(font/Symbola.ttf) format("truetype"),
-    url(font/Symbola.svg#Symbola) format("svg")
+    url(fonts/Symbola.woff2) format("woff2"),
+    url(fonts/Symbola.woff) format("woff"),
+    url(fonts/Symbola.ttf) format("truetype"),
+    url(fonts/Symbola.svg#Symbola) format("svg")
   ;
 }
 .font-srcs() when (@basic) {
-  src: url(font/Symbola-basic.eot);
+  src: url(fonts/Symbola-basic.eot);
   src:
     local("Symbola Regular"),
     local("Symbola"),
-    url(font/Symbola-basic.woff2) format("woff2"),
-    url(font/Symbola-basic.woff) format("woff"),
-    url(font/Symbola-basic.ttf) format("truetype")
+    url(fonts/Symbola-basic.woff2) format("woff2"),
+    url(fonts/Symbola-basic.woff) format("woff"),
+    url(fonts/Symbola-basic.ttf) format("truetype")
   ;
 }