createFolder() function should allow parameters

[jmrieger]

According to the most recent Dropbox API:
https://www.dropbox.com/developers/documentation/http/documentation#files-create_folder

The create_folder endpoint should allow both the path and autorename parameters. Path is figured automatically in your code, but there's no option for autorename.

[kunalvarma05]

This commit closes the issue.

Thanks :)