ahmontero/dop — pull request #28 by 2r2w (2014-06-22 10:13:06+00:00)
Title: add credentials file

Client Id and API Key now could be stored encrypted in credentials file.
Password will be asked every time user need to decrypt this file.
Encryption is done using AES in CFB mode from PyCrypt.
Initialisation is done using `Client.fromCredsFile()`.