Merge pull request #1 from seajs/master

sync with seajs master
Merge pull request #624 from leoner/master

增加测试运行过程中测试状态发布
Refactor util-request.js
Rebuild packages
Merge branch 'master' of github.com:seajs/seajs
Add totoro support
Improve quick start page
Update totoro target
Simplify code
Add specs for destroy
Rebuild packages
Fix a bug in Node.js environment
Expose setTimeout
Add specs for callback order
Add seajs.require method
Add test specs for seajs.require method
Rebuild packages
Emit error event on null exports
Add specs for error event
Improve specs for error event