Fixed js inclusion
fix on icon
JS timeout on Volume change

Behaviour is:
- on change (sliding the knob) => volume is updated every 200ms
- on release => the volume is instantly updated
Make volume knob smoother

Don't refresh GUI knob from real value when it's currently being modified
Incremental updates system

- Remove binary DB file from GIT versioning
- Add DB dump as init sql script
- Add .db in .gitignore
- Auto-run updates through update.py

Update init-db after rebase master

Add minidlna setting

Fix bug update script when running SQL script

Separate modules updates in dedicated file

+ small refactor in update.py