Add new Grunt build

tasks/examples.js

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+var path = require('path');
+var _ = require('lodash');
+
+function pathToArray(parts) {
+  var part = parts.shift();
+  if (parts.length > 0) {
+    var obj = {};
+    obj[part] = pathToArray(parts);
+    return obj;
+  } else {
+    return part;
+  }
+}
+
+module.exports = function(grunt) {
+  grunt.registerMultiTask('examples', 'Build examples site.', function() {
+    var options = this.options({
+      base: '',
+      excludes: []
+    });
+
+    this.files.forEach(function(f) {
+      var results = {};
+      f.src.filter(function(filepath) {
+        if (!grunt.file.exists(filepath)) {
+          grunt.log.warn('Source file "' + filepath + '" not found.');
+          return false;
+        } else {
+          filepath = path.relative(options.base, filepath);
+          return options.excludes.every(function(dir) {
+            return filepath.indexOf(dir + '/') < 0;
+          });
+        }
+      }).map(function(filepath) {
+        return pathToArray(path.relative(options.base, filepath).split('/'));
+      }).forEach(function(parts) {
+        _.merge(results, parts, function(a, b) {
+          var example = {
+            file: encodeURIComponent(b).replace(/%20/g, '+'),
+            title: b.substr(0, b.length - 3)
+          };
+          return _.isArray(a) ? a.concat(example) : [example];
+        });
+      });
+
+      grunt.file.write(f.dest, JSON.stringify(results, null, '  '));
+    });
+  });
+};

tasks/umd.js

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+var umdBefore = [
+  '!function(root, factory) {',
+  '  if (typeof define === "function" && define.amd) {',
+  '    define(factory);',
+  '  } else if (typeof exports === "object") {',
+  '      module.exports = factory();',
+  '  } else {',
+  '    root.Phaser = factory();',
+  '  }',
+  '}(this, function() {'
+].join('\n');
+
+var umdAfter = [
+  '  return Phaser;',
+  '});'
+].join('\n');
+
+module.exports = function(grunt) {
+  grunt.registerMultiTask('umd', 'Create an UMD wrapper.', function() {
+    this.files.forEach(function(f) {
+      var src = umdBefore + '\n' + f.src.filter(function(filepath) {
+        if (!grunt.file.exists(filepath)) {
+          grunt.log.warn('Source file "' + filepath + '" not found.');
+          return false;
+        } else {
+          return true;
+        }
+      }).map(function(filepath) {
+        return grunt.file.read(filepath);
+      }).join('\n') + umdAfter;
+
+      grunt.file.write(f.dest, src);
+    });
+  });
+};