Update Grunt tasks, add .editorconfig and .jshintrc configuration

.editorconfig

@@ -0,0 +1,17 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[{*.js, *.json}]
+indent_style = space
+indent_size = 4
+
+[*.css]
+indent_style = tab
+
+[*.md]
+trim_trailing_whitespace = false

.jshintrc

@@ -0,0 +1,36 @@
+{
+  // strict
+  "bitwise":       true,
+  "camelcase":     true,
+  "curly":         true,
+  "eqeqeq":        true,
+  "es3":           false,
+  "forin":         false,
+  "freeze":        false,
+  "immed":         true,
+  "indent":        4,
+  "latedef":       true,
+  "newcap":        true,
+  "noarg":         true,
+  "noempty":       true,
+  "nonew":         false,
+  "plusplus":      false,
+  "quotmark":      true,
+  "undef":         true,
+  "strict":        true,
+  "trailing":      true,
+  "maxparams":     4,
+  "maxdepth":      5,
+  "maxstatements": 20,
+  "maxlen":        120,
+
+  // environment
+  "browser":       true,
+
+  // globals
+  "globals": {
+    "jQuery":      true,
+    "module":      true,
+    "define":      false
+  }
+}

Gruntfile.js

@@ -1,48 +1,38 @@
 module.exports = function(grunt) {
 
-  grunt.initConfig({
-    pkg: grunt.file.readJSON('image-zoom.jquery.json'),
-    uglify: {
-      options: {
-        banner: [
-          '/*!',
-          ' * @name        <%= pkg.name %>',
-          ' * @author      <%= pkg.author.name %> <<%= pkg.author.url %>>',
-          ' * @modified    <%= grunt.template.today("dddd, mmmm dS, yyyy") %>',
-          ' * @version     <%= pkg.version %>',
-          ' */'
-        ].join('\n')
-      },
-      dist: {
-        files: [
-          {
-            src: 'src/easyzoom.js',
-            dest: 'dist/easyzoom.js'
-          }
-        ]
-      }
-    },
-    jshint: {
-      all: ['src/**/*.js'],
-      options: {
-        maxdepth: 4,
-        curly: true,
-        newcap: true,
-        eqeqeq: true,
-        browser: true,
-        trailing: true,
-        globals: {
-          jquery: true,
-          define: false,
-          exports: true
+    grunt.initConfig({
+        pkg: grunt.file.readJSON('image-zoom.jquery.json'),
+        uglify: {
+            options: {
+                banner: [
+                    '/*!',
+                    ' * @name        <%= pkg.name %>',
+                    ' * @author      <%= pkg.author.name %> <<%= pkg.author.url %>>',
+                    ' * @modified    <%= grunt.template.today("dddd, mmmm dS, yyyy") %>',
+                    ' * @version     <%= pkg.version %>',
+                    ' */'
+                ].join('\n')
+            },
+            dist: {
+                files: [
+                    {
+                        src: 'src/easyzoom.js',
+                        dest: 'dist/easyzoom.js'
+                    }
+                ]
+            }
+        },
+        jshint: {
+            all: ['src/**/*.js'],
+            options: {
+                jshintrc: true
+            }
         }
-      }
-    }
-  });
+    });
 
-  grunt.loadNpmTasks('grunt-contrib-jshint');
-  grunt.loadNpmTasks('grunt-contrib-uglify');
+    grunt.loadNpmTasks('grunt-contrib-jshint');
+    grunt.loadNpmTasks('grunt-contrib-uglify');
 
-  grunt.registerTask('default', ['jshint', 'uglify']);
+    grunt.registerTask('default', ['jshint', 'uglify']);
 
-};
+};

package.json

@@ -3,7 +3,7 @@
   "version": "2.1.0",
   "devDependencies": {
     "grunt": "0.4.x",
-    "grunt-contrib-jshint": "0.1.x",
-    "grunt-contrib-uglify": "0.2.x"
+    "grunt-contrib-jshint": "0.9.x",
+    "grunt-contrib-uglify": "0.4.x"
   }
-}
+}

src/easyzoom.js

@@ -1,4 +1,6 @@
-(function ($) {
+(function ($) {
+
+    'use strict';
 
     var dw, dh, rw, rh, lx, ly;