* 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
Fix of the issue that rejecting call with template
resulted in displaying 'Call ended' screen, while
'Call rejected' screen should be displayed.
Fixed missing 'USE' label in templates
window.
Fix for the loudspeaker becomes active again when a headset is unplugged
if it was on while the headset was connected to the phone.
Fix typo in Bluetooth in EventType enum.
By accident, I've broke DTMF handling via Pure's keyboard
This was because of non strict description of API method.
Now, it has been unified to use ASCII code
Reworked ending with sms is now reworked. Sms is send by call app,
application messages is only providing template text.
Also call hangup and sms send order is changed due to delays caused by
sending sms.
Call logic is now removed from call window and call app.
There was spaghetti logic mixed in window and app, now
call logic is based on notificatins from service cellular.
