Merge branch 'hotfix/keepalive' into develop
Merge branch 'hotfix/timerinterval' into develop
Modified handling of of volume_level attribute so that it uses dB (-80...18)
instead of percentage. Introduced volume_level_pct to reflect the old
behavior.
Fixed DENON_AVR_Parse in regards to properly handling the standby case.
This also fixes the toggle behavior.
- Modified handling of of volume_level attribute so that it uses dB (-80
...18) instead of percentage. Introduced volume_level_pct to reflect the
old behavior.

- Fixed DENON_AVR_Parse in regards to properly handling the standby case.
This also fixes problems with the toggle behavior.