Add Gruntfile for dist generation

.gitignore

@@ -0,0 +1 @@
+node_modules

Gruntfile.js

@@ -0,0 +1,51 @@
+module.exports = function (grunt) {
+  grunt.loadNpmTasks('grunt-sass');
+  grunt.loadNpmTasks('grunt-contrib-cssmin');
+  grunt.loadNpmTasks('grunt-contrib-copy');
+  grunt.loadNpmTasks('grunt-contrib-uglify');
+
+  grunt.initConfig({
+    sass: {
+      options: {
+        outputStyle: 'expanded'
+      },
+      dist: {
+        files: {
+          'dist/gridstack.css': 'src/gridstack.scss',
+          'dist/gridstack-extra.css': 'src/gridstack-extra.scss'
+        }
+      }
+    },
+
+    cssmin: {
+      dist: {
+        files: {
+          'dist/gridstack.min.css': ['dist/gridstack.css'],
+          'dist/gridstack-extra.min.css': ['dist/gridstack-extra.css']
+        }
+      }
+    },
+
+    copy: {
+      dist: {
+        files: {
+          'dist/gridstack.js': ['src/gridstack.js']
+        }
+      }
+    },
+
+    uglify: {
+      options: {
+        sourceMap: true,
+        sourceMapName: 'dist/gridstack.min.map'
+      },
+      dist: {
+        files: {
+          'dist/gridstack.min.js': ['src/gridstack.js']
+        }
+      }
+    }
+  });
+
+  grunt.registerTask('default', ['sass', 'cssmin', 'copy', 'uglify']);
+};

package.json

@@ -19,5 +19,12 @@
   "bugs": {
     "url": "https://github.com/troolee/gridstack.js/issues"
   },
-  "homepage": "http://troolee.github.io/gridstack.js/"
+  "homepage": "http://troolee.github.io/gridstack.js/",
+  "devDependencies": {
+    "grunt": "^0.4.5",
+    "grunt-contrib-copy": "^0.8.2",
+    "grunt-contrib-cssmin": "^0.14.0",
+    "grunt-contrib-uglify": "^0.10.1",
+    "grunt-sass": "^1.1.0"
+  }
 }