Added grunt tasks

Gruntfile.js

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+module.exports = function(grunt) {
+
+  grunt.initConfig({
+
+    pkg: grunt.file.readJSON('package.json'),
+
+    concat: {
+      all: {
+        src: [
+          'jsketch.js',
+          'jquery.sketchable.js',
+          'jquery.sketchable.memento.js',
+        ],
+        dest: 'dist/jsketch.all.js'
+      }
+    },
+
+    uglify: {
+      jsketch: {
+        files: {
+          'dist/jsketch.min.js': [ 'jsketch.js' ]
+        }
+      },
+      jsketchable: {
+        files: {
+          'dist/jquery.jsketchable.min.js': [ 'jquery.sketchable.js' ]
+        }
+      },
+      memento: {
+        files: {
+          'dist/jquery.jsketchable.memento.min.js': [ 'jquery.sketchable.memento.js' ]
+        }
+      },
+      all: {
+        options: {
+          banner: '/*! <%= pkg.description %> (all in one) | v<%= pkg.version %> | <%= grunt.template.today("yyyy-mm-dd") %> */\n'
+        },
+        files: {
+          'dist/jsketch.all.min.js': [ '<%= concat.all.dest %>' ]
+        }
+      }
+    },
+
+    clean: {
+      js: [
+        'dist/*.js', '!dist/*.min.js'
+      ]
+    },
+
+  });
+
+  grunt.loadNpmTasks('grunt-contrib-uglify');
+  grunt.loadNpmTasks('grunt-contrib-concat');
+  grunt.loadNpmTasks('grunt-contrib-clean');
+
+  grunt.registerTask('all',         [ 'concat:all', 'uglify:all', 'clean' ]);
+  grunt.registerTask('jsketch',     [ 'uglify:jsketch', 'clean' ]);
+  grunt.registerTask('jsketchable', [ 'uglify:jsketchable', 'clean' ]);
+  grunt.registerTask('memento',     [ 'uglify:memento', 'clean' ]);
+  grunt.registerTask('default',     [ 'concat:all', 'uglify:all', 'uglify:jsketch', 'uglify:jsketchable', 'uglify:memento', 'clean' ]);
+};

package.json

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+{
+  "name": "jsketch",
+  "version": "1.8",
+  "description": "jSketch drawing lib",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/luileito/jsketch.git"
+  },
+  "keywords": [
+    "draw",
+    "sketch",
+    "strokes"
+  ],
+  "author": "Luis A. Leiva",
+  "license": "ISC",
+  "dependencies": {
+  },
+  "devDependencies": {
+    "grunt": "^0.4.5",
+    "grunt-contrib-concat": "^0.5.1",
+    "grunt-contrib-uglify": "^0.9.1"
+  }
+}