added initial version of Atomic Line List service [WIP]

This will fix issue #290. Support for more parameters is missing but will come soon.

Edit: The docstring for the method ``query_object`` needs to be fixed as well.
if `res` was a regular dict, you could do:
```
if key in res:
    res[key].append(value)
else:
    res[key] = [value]
```
no?