add gruntfile

Gruntfile.js

@@ -0,0 +1,51 @@
+module.exports = function(grunt) {
+
+  //Load NPM tasks
+  grunt.loadNpmTasks('grunt-contrib-watch');
+  grunt.loadNpmTasks('grunt-mocha-test');
+  grunt.loadNpmTasks('grunt-markdown');
+  grunt.loadNpmTasks('grunt-shell');
+
+  // Project Configuration
+  grunt.initConfig({
+    shell: {
+      browserify: {
+        options: {
+          stdout: true,
+          stderr: true
+        },
+        command: grunt.option('target') === 'dev' ?
+            'node ./util/build.js -d ' : 'node ./util/build.js '
+      }
+    },
+    watch: {
+      readme: {
+        files: ['README.md'],
+        tasks: ['markdown']
+      },
+      scripts: {
+        files: ['**/*.js', '**/*.html', '!**/node_modules/**', '!browser/bundle.js', '!browser/testdata.js', '!lib/**js', '!browser/vendor-bundle.js'],
+        tasks: ['shell'],
+      },
+    },
+    mochaTest: {
+      options: {
+        reporter: 'spec',
+      },
+      src: ['test/*.js'],
+    },
+    markdown: {
+      all: {
+        files: [{
+          expand: true,
+          src: 'README.md',
+          dest: '.',
+          ext: '.html'
+        }]
+      }
+    }
+  });
+
+  grunt.registerTask('default', ['shell','watch']);
+
+};