title: Task "serve" not found
body: <p>I'm a newbie in Angular and I've cloned a repo (angular-slider). My problem is that when I type in console grunt serve it says Warning: Task "serve" not found. Use --force to continue. I've been searching through Internet and I've tried everything. I don't know which is the origin of my problem. If I type node -v the console gives me this v0.10.33 and if I type npm -v I get this 2.11.2 I already have a Gruntfile.js and a package.json and bower.json at the same level folder that my root project directory. Any help would be appreciated. </p>
  
  <p>Edited: </p>
  
  <p>This is my Gruntfile.js</p>
  
  <pre><code>module.exports = function(grunt){
  'use strict';
  
  // Project configuration.
  grunt.initConfig({
      pkg: grunt.file.readJSON('package.json'),
      srcFiles: [
          'src/rangeInputSupported.js',
          'src/angular-slider.js'
      ],
      concat: {
          prod: {
              src: ['&lt;%= srcFiles %&gt;'],
              dest: 'build/&lt;%= pkg.name %&gt;.js'
          }
      },
      uglify: {
          options: {
              banner: '/*\n &lt;%= pkg.name %&gt; v&lt;%= pkg.version %&gt; \n (c) 2013-2014 Venturocket, Inc. http://github.com/Venturocket \n License: MIT \n*/\n'
          },
          build: {
              src: ['&lt;%= srcFiles %&gt;'],
              dest: 'build/&lt;%= pkg.name %&gt;.min.js'
          }
      },
      jshint: {
          options: {
              jshintrc: true,
              reporter: require('jshint-stylish')
          },
          all: {
              src: [
                  'Gruntfile.js',
                  'karma.conf.js',
                  'src/**/*.js',
                  'test/**/*.js'
              ],
              options: {
                  force: true
              }
          }
      }
  });
  
  // Load the plugin that provides the "uglify" task.
  grunt.loadNpmTasks('grunt-contrib-uglify');
  grunt.loadNpmTasks('grunt-contrib-jshint');
  
  // Default task(s).
  grunt.registerTask('default', ['jshint:all', 'uglify', 'concat:prod']);
  
  grunt.loadNpmTasks('grunt-contrib-concat');
  
  };
  </code></pre>
  
  <p>And my bower.json looks like this:</p>
  
  <pre><code>{
  "name": "angular-slider",
  "version": "0.3.2",
  "main": "./build/angular-slider.js",
  "ignore": [
      "**/.*",
      "node_modules",
      "components",
      "lib",
      "src",
      "test",
      ".g*",
      ".editorconfig",
      ".jshintrc",
      ".travis.yml",
      "Gruntfile.js",
      "karma.conf.js",
      "*.html"
  ],
  "dependencies": {
      "angular": "~1.2",
      "angular-touch": "~1.2"
  },
  "devDependencies": {
      "angular-mocks": "*",
      "angular-scenario": "*"
  },
  "resolutions": {
      "angular": "v1.2.16"
  }
  }
  </code></pre>