encode_utils

Highlights:

1. New method to download files and documents connection.Connection.download().
2. Updated connection.Connection.search() such that the user can now provide a URL with an embedded query string.
3. Updated connection.Connection.upload_file() such that a new argument is present to allow recalculation of the md5sum and setting that on the file record in the Portal.

Other:

• Updated connection.Connection.post() such that if there is a conflict error and a GET does't work on any of the provided aliases, an Exception is raised.
• Updated utils.add_alias_prefix() to raise an Exception if the lab prefix isn't found.