Updated Makefile to use PyPackage, added option to build source package,
and updated PKG_SOURCE_URL.

Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com>

Modified Django FileResponse that adds Content-Range headers.
This package is a direct dependency of django-simple-captcha, a
dependency of seafile-seahub.

Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com>

A set of high-level abstractions for Django forms.
This package is a direct dependency of seafile-seahub.

Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com>