Create package.json to allow installing with NPM

Just adding a package.json to the repository will allow it to be installed through NPM by providing the git user and repo name, e.g. `npm install jgthms/bulma --save`

package.json

@@ -0,0 +1,23 @@
+{
+  "name": "bulma",
+  "version": "0.0.4",
+  "homepage": "http://bulma.io",
+  "author": "jgthms <bbxdesign@gmail.com>",
+  "description": "Bulma is a modern CSS framework based on Flexbox",
+  "main": "bullma.sass",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/jgthms/bulma.git"
+  },
+  "license": "MIT",
+  "keywords": [
+    "css",
+    "sass",
+    "flexbox",
+    "responsive",
+    "framework"
+  ],
+  "bugs": {
+    "url": "https://github.com/jgthms/bulma/issues"
+  }
+}