Bug 1023764 - [Loop] Keep Contacts Info updated. r=borjasalguero, jaoo

Actually, why dont we move everything related with contacts to `ActionLogDB`? So `ActionLogDB.addCall`would return `error` or `callObject`, where the latter is the `call` updated with all the info of Contacts. With this object we would call to `_appendCall()` method. I have some concern about the performance storing before rendering, but as we are talking of just one element this should be fast.