Refactored authorization approach, each method
will now authorize on it's own if not previously
authorized. Also renamed the methods to match the
API calls (see [API explorer](https://api.telldus.com/explore/index))
Removed the need to have a configuration file, now the user will be asked for the keys on first launch and then it will be saved to ~/.rtelldus
Changed incorrect post to get during clients list call
Some formatting changes
Added some more API calls such as sensors
Added dim API call