Use blokaslabs apt for rt kernel

stage3/01-install-packages/00-packages

@@ -0,0 +1,14 @@
+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
+rfkill
+gldriver-test
+fonts-droid-fallback
+fonts-liberation2
+obconf
+arandr
+mixxx

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

@@ -0,0 +1,6 @@
+xserver-xorg-video-fbdev xserver-xorg xinit xserver-xorg-video-fbturbo
+mousepad
+lxde lxtask menu-xdg
+zenity xdg-utils
+gvfs-backends gvfs-fuse
+lightdm gnome-themes-standard-data gnome-icon-theme