fixed multiple volume request on volume change

changed event and added a small timeout to prevent unnecessary volume stumble
fixes linebreak when browsing on small screen phones
added media qy for small devices (320px)
deny web access to _OS_SETTINGS

I don't really see a reason why this should be accessible via web...
Merge pull request #31 from jomo/patch-1

deny web access to _OS_SETTINGS
Update _footer.php
Merge pull request #26 from enapupe/mediaqy-mobilesmalll

added media qy for small devices (320px)
Merge pull request #25 from enapupe/fix-textwrap

fixes linebreak when browsing on small screen phones
Merge pull request #23 from enapupe/master

fixed multiple volume request on volume change
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