Add usbmount and mixxx config and udev rules

stage3/01-install-packages/00-packages

@@ -1,7 +1,6 @@
 gstreamer1.0-x gstreamer1.0-omx gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-plugins-bad gstreamer1.0-alsa gstreamer1.0-libav
 qpdfview gtk2-engines alsa-utils
 desktop-base
-git
 raspberrypi-artwork
 policykit-1
 gvfs
@@ -11,4 +10,5 @@ fonts-droid-fallback
 fonts-liberation2
 obconf
 arandr
+usbmount
 mixxx

stage3/01-install-packages/00-packages-nr

@@ -1,5 +1,4 @@
-git
 xserver-xorg-video-fbdev xserver-xorg xinit xserver-xorg-video-fbturbo xserver-xorg-legacy xscreensaver
 xdg-utils gvfs-backends gvfs-fuse
-lightdm gnome-themes-standard-data gnome-icon-theme i3 i3status
+lightdm xterm i3 i3status
 liblo7 liblo-dev libasound-dev libjack-jackd2-dev