documentation for download_file got mangled

[benson-basis]

Look here, and you will see that most of the doc for the download_file operation is missing.

http://boto3.readthedocs.org/en/latest/reference/services/s3.html#S3.Bucket.download_file

[mtdowling]

Thanks for reporting. We'll take a look.

[JordonPhillips]

This appears to have been fixed with #459. The issue was that custom functions were being put in the wrong 'section', causing them to be out of order and to have some pretty glaring formatting issues.