Add Key/Value fetch method

[sbernhard]

No description provided.

[raibisch]

Hi sbernhard, feel free to add this in your fork, but this would be the same function as the existing fetch command... so I like to close this pull request

[sbernhard]

Well, this method returns all data in a very easy parse-able way including the status as integer. Often its more eays to parse key=value than to split by "," and select the field you need (which may change in the future).