Build folder removal

Build files should be generated by each individual developer. When releasing a new version the proper compiled files should be provided in the project site without the need to download the entire tagged repository.

Also, by allowing build files to be available publicly through github, it does encourages developers to hotlink the raw files directly from it. That can cause trouble due to the fact that:

> The file is being served as text/plain and as such being blocked in Internet Explorer on Windows 7 for instance (because of the wrong MIME type).

https://github.com/carhartl/jquery-cookie#installation

I haven't checked if the problem above is still happening but, despite that, hotlinking files directly from github is not a good practice, so this should not be facilitated in any way