Add browserify version of famous-angular

A small addition to build a browserfy version of famous-angular.

The file `dist/famous-angular-browserify.js` is generated during the `build` gulp task from `services/famous-angular-browserify.js`.

There is a small maintenance overhead as i add to create a copy of the top file `services/famous.js` called `services/famous-angular.js` removing the `requirejs` stuff.

Now to use it:
* create a new project
* npm init
* bower init
* create a .bowserrc file with content `{"directory":"src/client/scripts/vendors"}`
* npm install --save-dev gulp gulp-browserify gulp-rename browserify browserify-shim
* bower install --save angular angular-mocks thaiat/famous-angular#master
Add the following config to package.json
```javascript
"dependencies": {
    "famous": "http://code.famo.us/famous/common/famous-0.2.2.tar.gz"
  },
  "browser": {
    "angular": "./src/client/scripts/vendors/angular/angular.js",
    "angular-mocks": "./src/client/scripts/vendors/angular-mocks/angular-mocks.js",
    "famous-angular": "./src/client/scripts/vendors/famous-angular/dist/famous-angular-browserify.js"
  },
  "browserify": {
    "transform": [
      "browserify-shim"
    ]
  },
  "browserify-shim": {
    "angular": {
      "exports": "angular"
    },
    "angular-mocks": {
      "depends": [
        "angular"
      ]
    },
    "famous": {
      "exports": "famous"
    },
    "famous-angular": {
      "depends": [
        "angular",
        "famous"
      ]
    }
  }
```
* run npm install (to install the new dependency of famous : "http://code.famo.us/famous/common/famous-0.2.2.tar.gz")
* create a gulp file to bundle your main.js
```javascript
var gulp = require('gulp');
var rename = require('gulp-rename');
var browserify = require('gulp-browserify');

gulp.task('bundle', function() {

    gulp.src('./src/client/scripts/main.js')
        .pipe(browserify())
        .pipe(rename('bundle.js'))
        .pipe(gulp.dest('./src/client/scripts'));
});
```

* add the following main.js in src/client/scripts
```javascript
require('angular');
require('famous-angular');

var app = angular.module('app', ['famous.angular']);
app.controller('hello', function($scope) {
    $scope.message = 'Hello World';
});
```

* add an index.html
```html
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>Famous</title>
    <link rel="stylesheet" href="../../node_modules/famous/core/famous.css">
    <link rel="stylesheet" href="scripts/vendors/famous-angular/dist/famous-angular.css">
</head>

<body ng-app="app" fa-app>
    <h1 ng-controller="hello">{{message}}</h1>
    <fa-surface fa-background-color="'red'">Hello Famous</fa-surface>
    <script src="scripts/bundle.js"></script>
</body>

</html>
```

And you should see a red famous surface when you load index.html in the browser