Lepozepo/S3 — pull request #14 by ajduke (2014-07-15 11:27:12+00:00)
Title: fixes for if user does not specifies the optional 'directory' attribute ...

...in 'S3.config' object

if user does not specify the optional 'directory' attibute, in final name of uploaded file-name, gets undefined in it. due to directory attribute being 'undefined'
`
http://s3.amazonaws.com//**undefined**69f049b8-ea15-46fd-ad9a-3b715f59606d.png
`