Add GET as an alias for retr
Login before trying to download
Address comments from the pull request

- It is not necessary to monkeypatch get
- The login call should be in send, not retr
Merge pull request #4 from asmeurer/get

Fixes #3
Mention @asmeurer in AUTHORS.
V0.2.0
Fix url in setup.py
Merge pull request #5 from reclosedev/patch-1

Fix url in setup.py
Use startswith, not indexing.