update cli interface to support collecting multiple lists

[pekasen]

right now we cant iterate through a number of lists but must schedule them indenpently. Better solution would be to do something like this: factli posts --options list_id1 list_id2 list_id3.

For even more convenience we could store API keys and list IDs in JSON format:

{
  "token": "heregoesthefancycrowdtangletoken",
  "list_ids": {
    "ElvisImpersonators": "1234567",
    "AliensAndReptiloids": "1234567"
  }
}

Which would allow us to reference the lists by name: factli posts ElvisImpersonators.