Updated Readme.md

Fixed indentation typo on Readme.md. Removed the extra indent on addLoadEvent function closing parentheses. 

Before:
![screenshot 2014-07-05 15 06 52](https://cloud.githubusercontent.com/assets/2942583/3487640/785f43b4-0491-11e4-94c9-319fd2fab37f.png)
After:
![screenshot 2014-07-05 15 06 20](https://cloud.githubusercontent.com/assets/2942583/3487639/71319f06-0491-11e4-99ec-7d998fa4e1f1.png)