Added gruntfile

Gruntfile.js

@@ -0,0 +1,70 @@
+/*global module:false*/
+module.exports = function(grunt) {
+
+	// Project configuration.
+	grunt.initConfig({
+		// Metadata.
+		meta: {
+			version: '2.0.3'
+		},
+		banner: '/*! picturePolyfill - v<%= meta.version %> - ' +
+			'<%= grunt.template.today("yyyy-mm-dd") %>\n' +
+			'* https://github.com/verlok/picturePolyfill/\n' +
+			'* Copyright (c) <%= grunt.template.today("yyyy") %> ' +
+			'Andrea "verlok" Verlicchi; Licensed MIT */\n',
+		// Task configuration.
+		uglify: {
+			options: {
+				banner: '<%= banner %>'
+			},
+			dist: {
+				src: 'picturePolyfill.js',
+				dest: 'picturePolyfill.min.js'
+			}
+		},
+		jshint: {
+			options: {
+				curly: true,
+				eqeqeq: true,
+				immed: true,
+				latedef: true,
+				newcap: true,
+				noarg: true,
+				sub: true,
+				undef: true,
+				unused: true,
+				boss: true,
+				eqnull: true,
+				browser: true,
+				globals: {
+					jQuery: true
+				}
+			},
+			gruntfile: {
+				src: 'Gruntfile.js'
+			},
+			lib: {
+				src: ['<%= uglify.dist.src %>']
+			}
+		},
+		watch: {
+			gruntfile: {
+				files: '<%= jshint.gruntfile.src %>',
+				tasks: ['jshint:gruntfile']
+			},
+			lib: {
+				files: '<%= jshint.lib.src %>',
+				tasks: ['jshint:lib', 'uglify']
+			}
+		}
+	});
+
+	// These plugins provide necessary tasks.
+	grunt.loadNpmTasks('grunt-contrib-uglify');
+	grunt.loadNpmTasks('grunt-contrib-jshint');
+	grunt.loadNpmTasks('grunt-contrib-watch');
+
+	// Default task.
+	grunt.registerTask('default', ['jshint', 'uglify']);
+
+};