[Screeninvader] Audio Bug/s

[pl]

Hi, I was running into several issuess with sound when I set up the
screeninvader image 09c2b4b24f216c3183a226b531fe91b366ef606d few days ago.

#What was wrong:
 - 'lounge' user wasn't in the audio group
   - usermod -a -G audio lounge
 - .asoundrc wasn't configured for audio-jack usage (only hdmi)
   - moving .asoundrc somewhere else is a hotfix (will break changing
volume on screeninvader interface, you can use alsamixer to change sound)