OrdinaryCallingFormat returns None in s3.lookup()

[jvivian]

Hey there,

In s3-multipart-download.py you repeat the connect_s3() call
https://github.com/mumrah/s3-multipart/blob/master/s3-mp-download.py#L110-L113

which causes this to happen:

DEBUG:s3-mp-download:CLI args: Namespace(dest='./test', force=False, max_tries=5, num_processes=2, quiet=False, secure=True, split=32, src='s3://cgl-driver-projects/test/test', verbose=True)
DEBUG:s3-mp-download:split_rs: SplitResult(scheme='s3', netloc='cgl-driver-projects', path='/test/test', query='', fragment='')
Traceback (most recent call last):
  File "../../s3-multipart/s3-mp-download.py", line 170, in <module>
    main(**arg_dict)
  File "../../s3-multipart/s3-mp-download.py", line 115, in main
    raise ValueError("'%s' is not a valid bucket" % split_rs.netloc)
ValueError: 'cgl-driver-projects' is not a valid bucket

If i remove the OrdinaryCallingFormat() call, which I know let's you select buckets with dots, then it works no problem.

Unrelated, and I think this may be a boto issue, but https://github.com/mumrah/s3-multipart/blob/master/s3-mp-download.py#L116 fails if I don't provide a src that has an extension. e.g. s3://bucket/test/test fails, but s3://bucket/test/test.txt succeeds.

Thanks