Typo in Readme

[zsthampi]

I noticed the method to get contents is getContentByID (ID in caps). It is written incorrectly in the readme and NPM page.

I found this API and readme extremely helpful! Cheers!

[dyhwong]

Thanks for the catch! If you want to submit a pull request for it, I'd be happy to merge it in.

[developerJuiceLozzoc]

Wasnt the issue closed already with #3 ?