* Adding document describing how to use logger
* Adjusting logs to follow a new guide
* Change order in log header:
line number is now before function name
When sms record is created/updated/removed during
connection with Mudita Center, notification of that
action should be collected in outbox endpoint to
keep contacts data synchronized between MuditaOS
and Mudita Center.
Pagination added for contact endpoint.
Introduced PagedContext and query message for contacts that returns
the required contacts together with the number of all contacts in db.
Introduce a new way to handle query responses allowing to deal with
races:
- bind reponse with request,
- handle responses with an observer-like interface.
Signed-off-by: Marcin Smoczyński <smoczynski.marcin@gmail.com>
