create README for npm package

Closes #71.

gulpfile.js

@@ -447,7 +447,8 @@ gulp.task('publish', function(done) {
     function() {
       var packageJSONTemplate = _.template(fs.readFileSync('scripts/npm/package.json'));
       packageJSONContents = packageJSONTemplate({ 'version': version, 'ngVersion': ngVersion });
-      fs.writeFileSync("dist/package.json", packageJSONContents);
+      fs.writeFileSync('dist/package.json', packageJSONContents);
+      fs.writeFileSync('dist/README.md', fs.readFileSync('scripts/npm/README.md'));
 
       // publish to npm
       exec('cd dist && npm publish', function (err, stdout, stderr) {

scripts/npm/README.md

@@ -0,0 +1,26 @@
+Ionic Framework
+=========
+https://github.com/driftyco/ionic2
+
+Bundles:
+ - `css/`
+     - the Ionic CSS stylesheet
+ - `fonts/`
+     - Ionicons and Roboto fonts
+ - `js/`
+     - `ionic.js` the Ionic module, in System register format
+     - `ionic.bundle.js` the Ionic bundle, contains:
+          * traceur-runtime.js
+          * es6-module-loader.js
+          * system.js
+          * angular2.dev.js
+          * router.dev.js (angular2 router)
+          * ionic.js
+          * web-animations.min.js
+     - `web-animations.min.js` web animations API polyfill
+
+Source files:
+ - `src/es5` - Ionic ES5 source files in both CommonJS and System module formats
+ - `src/es6` - Ionic ES6 source files
+ - `src/ts` - Ionic TypeScript source files (typings still missing)
+ - `scss` - Ionic Sass source files