Mifiel

Features
- Allow to add viewers on document creation

Features
- Allow to pass any argument to Document.create to support more features

Bug fixes
- Fix save_file and save_file_signed to save binary files

Features
- Ability to use the timeout parameter of the requests

Bug fixes
- Allow empty responses from server (status codes 204 and 205) - [PR8](https://github.com/Mifiel/python-api-client/pull/8)

Bug fixes
- Fix authentication when the system locale is different than en_US - [PR6](https://github.com/Mifiel/python-api-client/pull/6)