Add a bower.json

Summary: Add a bower.json so KaTeX can be included using bower.

Test plan:
 - Run `bower install /path/to/KaTeX#this-commit` from /tmp
 - See that `bower_components/KaTeX` contains only the full `dist/`
   directory

Auditors: alpert

bower.json

@@ -0,0 +1,31 @@
+{
+  "name": "KaTeX",
+  "version": "0.3.0",
+  "homepage": "http://khan.github.io/KaTeX/",
+  "description": "Fast math typesetting for the web.",
+  "moduleType": [
+    "amd",
+    "globals",
+    "node"
+  ],
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/Khan/KaTeX.git"
+  },
+  "ignore": [
+    "**/.*",
+    "/*.txt",
+    "/*.js",
+    "/*.md",
+    "/package.json",
+    "/Makefile",
+    "/build",
+    "/test",
+    "/src",
+    "/contrib",
+    "/dockers",
+    "/metrics",
+    "/static"
+  ]
+}