Initial build of ReactTransitionGroup

This builds `ReactTransitionGroup` with it's own copy of `React`, which
it total clownshoes. This should be technically usable, but definitely
should not be used in any production environment.

Gruntfile.js

@@ -54,6 +54,7 @@ module.exports = function(grunt) {
 
   grunt.registerTask('build:basic', ['jsx:debug', 'browserify:basic']);
   grunt.registerTask('build:transformer', ['jsx:debug', 'browserify:transformer']);
+  grunt.registerTask('build:transitions', ['jsx:debug', 'browserify:transitions']);
   grunt.registerTask('build:min', ['jsx:release', 'browserify:min']);
   grunt.registerTask('build:test', [
     'jsx:jasmine',
@@ -71,6 +72,7 @@ module.exports = function(grunt) {
     'jsx:debug',
     'browserify:basic',
     'browserify:transformer',
+    'browserify:transitions',
     'jsx:release',
     'browserify:min',
     'copy:react_docs',

grunt/config/browserify.js

@@ -76,8 +76,19 @@ var transformer = {
   after: [simpleBannerify]
 };
 
+var transitions = {
+  entries: [
+    './build/modules/ReactTransitionGroup.js'
+  ],
+  outfile: './build/react-transitiongroup.js',
+  debug: false,
+  standalone: 'ReactTransitionGroup',
+  after: [simpleBannerify]
+};
+
 module.exports = {
   basic: basic,
   min: min,
-  transformer: transformer
+  transformer: transformer,
+  transitions: transitions
 };