Differentiate response errors

[niro1987]

Please review these changes.

request wrapper now differentiates between different types of errors.

• ResponseError in case of 5** resposne
• LoginError in case of 4** response
• RequestError in case of connection issues
• Error("Unknown error") in case of any response <> status_code 200

[persandstrom]

Something is missing now. A default action must be taken if non of the statements are true. An exception for unknown response?

[niro1987]

The default action is the Unknown Error

[persandstrom]

You are correct!