add a first draft of an NPM package.json

package.json

+{
+  "name": "rsvp",
+  "version": "1.0.0",
+  "description": "Promises and Events",
+  "main": [ "browers/rsvp.js" ],
+  "dependencies": {
+  },
+  "devDependencies": {
+    "jshint": "~0.9"
+  },
+  "scripts": {
+    "test": "rake"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git@github.com:tildeio/rsvp.js.git"
+  },
+  "keywords": [
+    "promises",
+    "futures",
+    "events"
+  ],
+  "author": "Tilde, Inc.",
+  "license": "MIT"
+}