Fixed #17517 -- Added `--name` option to startproject and startapp management...

Fixed #17517 -- Added `--name` option to startproject and startapp management commands to be able to render files without a file extension. Thanks, Florian Apolloner.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@17432 bcc190cf-cafb-0310-a4f2-bffc1f526a37