Channel map

[janbar]

Hi Christian,

Here you will find all to resolve issue #149

[janbar]

Here a sample from @atpage

https://gist.github.com/atpage/ed6b0890798f2b762e6e

The query aggregate data with distinct service_id. I haven't the case, but atpage have 2 cards and he has few distinct servive_id per tuple. So rows are duplicated: 23 channels but query returned 205 rows.

[fetzerch]

Thanks a lot! I've merged it to master and frodo.