[BH-1836] Increase range of volume adjustment

Extended volume scale from 10 to 15 point scale
Modified volume approximation function for better user experience

[BH-1264] Add alarm sound fade in

Adding a fade in for the alarm sound (main and power nap) according to
the pattern (V): dt = 30[s] * V/10.

[BH-1823] Fix relaxation start delay for specific MP3 files

Fix of the issue that when trying to play
files with large ID3V2 metadata the
playback would start with significant
delay of several seconds. It was also
possible to leave relaxation progress
window without stopping the playback.

[BH-1688] Create a standard for logs

* 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

[MOS-552] Fix alarm clock input behavior

Fix of multiple issues that manifested in
input fields of alarm clock, i.e. value
not erasing automatically, redundant
double-zero filling of hours field,
lack of zero-filling of minutes field
when navigating to AM/PM field in
12h mode.

[MOS-30] Fix for Alarm not being handled properly during a phone call

During the phone call, the alarm was not displayed and subsequent alarms
after this scenario did not work. This has now been fixed and the alarm
during a phone call will be automatically snooze.

[CP-1841] Distorted playback and poor device control responsiveness

Fixed problem with an unresponding device after playing specific WAV files.
WAV files encoded with ADPCM are not supported now by the devices.

[CP-1837] Random crashes while copying files

Use ConstMemoryConstrainedFileRef newly added to taglib

[MOS-878] Don't break audio playback on file deletion

Since a currently played file is deleted, the player
goes to the next file from the list. A special case:
if the deleted file is the last one, the playback
stops (and can be resumed by the user).

[MOS-871] Loudspeaker icon is not updated when audio routing has changed

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.

[MOS-205] Unneeded fs notify events

Fixed problem with fs notification events
being sent one time too many.

[MOS-882] Fix heap fragmentation issue during playback

Fix of the heap fragmentation issue that caused
phone crash when trying to play music files
while connecting USB cable in a certain order.
Audio stream buffering length was slightly
reduced, so that smaller contiguous block of
heap is required to store audio buffer.

[MOS-882] Fix FLAC file playback with USB cable connected

Fix of the issue that caused system crash when
trying to play 96kHz FLAC file with USB cable
connected. The reason of the issue was the lack
of FreeRTOS heap space left, what caused
pvPortMalloc() to fail when allocating
memory for stream buffer.

Additionally minor code cleanup.

[MOS-783] Moved battery config file to '/user/data'

Moved battery config file from root
directory of user partition to
'data' directory to comply with
new directory layout design.

[MOS-783] Working Pure simulator after partition changes

Fixed iosyscalls so that Pure simulator
works after directory structure changes.

[MOS-783] First part of new dir structure implementation

    Works:
    - generating .img for Pure;
    - Pure boots after flashing new image and
    seems to be working fine;

    Not yet:
    - generating update package;
    - generating image for Harmony;
    - simulator;
    - path-related unit tests fail
    due to paths being hardcoded
    in test scenarios.

[MOS-767] Fix full path displayed for invalid audio file

Fix of the issue that whole file path was
displayed instead of just filename in music
player for invalid audio file for which Taglib
failed to obtain tags.

[MOS-814] Fix no sound after BT device connection during call

Fix of the issue that connecting or
disconnecting BT device while call
was in progress resulted in no sound
being heard anywhere due to audio
routing being stopped when HFP device
disconnected.

Additionally minor code cleanup.

[MOS-765] Fixed crash on invalid ID3 tag

Bumped taglib version to latest master
Added sanity check for version field in tag parser in taglib
so in case of damaged/invalid tag it returns no tag at all

It was caused by zipped mp3 files and renamed to mp3 again

[MOS-779] Fix music files extensions case sensitivity

Fix of the issue that only files with
extension in lowercase were detected
and listed in the music player's
library.
Additionally code cleanup.