============ Store some commonly used links ==============
https://developer.mozilla.org/zh-CN/ -------- Firefox Developer Documentation
http://www.w3school.com.cn/ ------------ ----- W3School Online Tutorial
http://www.cnblogs.com/ ----------------------- Blog Park
http://lib.csdn .net/ ------------------------------ CSDN Knowledge Base
https://github.com/ ------ ----------------------- GitHub open source project
http://www.runoob.com/ -------------- --------- Rookie Tutorial
http://www.gitlogs.com/ ------------------------ Online GitHub project search engine
http://babeljs.cn/ ------------------------------- JavaScript compiler
https://juejin.im/ -------------------------------- Nuggets