Add a concat step to build to provide an unminified version for development

Gruntfile.js

@@ -1,10 +1,26 @@
 module.exports = function(grunt) {
+  grunt.loadNpmTasks('grunt-contrib-concat');
   grunt.loadNpmTasks('grunt-contrib-uglify');
   grunt.loadNpmTasks('grunt-contrib-yuidoc');
   grunt.loadNpmTasks('grunt-karma');
 
   var os = require('os').type();
   var browsers = ['Chrome', 'Firefox'];
+  var sourceFiles = [
+    'src/boot.js',
+    'src/touch-action.js',
+    'src/PointerEvent.js',
+    'src/pointermap.js',
+    'src/sidetable.js',
+    'src/dispatcher.js',
+    'src/installer.js',
+    'src/mouse.js',
+    'src/touch.js',
+    'src/ms.js',
+    'src/platform-events.js',
+    'src/capture.js'
+  ];
+
   if (os == 'Darwin') {
     browsers.push('ChromeCanary');
   }
@@ -13,27 +29,24 @@ module.exports = function(grunt) {
   }
 
   grunt.initConfig({
+    concat: {
+      pointerevents: {
+        options: {
+          stripBanners: true,
+          banner: grunt.file.read('LICENSE')
+        },
+        src: sourceFiles,
+        dest: 'pointerevents.dev.js'
+      }
+    },
     uglify: {
       pointerevents: {
         options: {
           sourceMap: 'pointerevents.min.js.map',
           banner: grunt.file.read('LICENSE')
         },
         dest: 'pointerevents.min.js',
-        src: [
-          'src/boot.js',
-          'src/touch-action.js',
-          'src/PointerEvent.js',
-          'src/pointermap.js',
-          'src/sidetable.js',
-          'src/dispatcher.js',
-          'src/installer.js',
-          'src/mouse.js',
-          'src/touch.js',
-          'src/ms.js',
-          'src/platform-events.js',
-          'src/capture.js',
-        ]
+        src: sourceFiles
       }
     },
     karma: {
@@ -53,7 +66,7 @@ module.exports = function(grunt) {
     }
   });
 
-  grunt.registerTask('default', 'uglify');
+  grunt.registerTask('default', ['concat', 'uglify']);
   grunt.registerTask('test', 'karma:polymer');
   grunt.registerTask('test-buildbot', 'karma:buildbot');
 };

package.json

@@ -12,6 +12,7 @@
     "chai": "*",
     "chai-spies": "*",
     "grunt": "*",
+    "grunt-contrib-concat": "*",
     "grunt-contrib-uglify": "*",
     "grunt-contrib-yuidoc": "*",
     "karma-mocha": "*",