Minor cleanup of the init script and the readme

root/etc/cont-init.d/98-mesa

@@ -2,32 +2,25 @@
 
 # Determine if setup is needed
 if [ ! -f "/usr/bin/apt" ]; then
-  echo "**** Image is not Ubuntu, skipping opencl-intel install ****"
-  exit 0
+    echo "**** Image is not Ubuntu, skipping opencl-intel install ****"
+    exit 0
 fi
 
 pkgs='mesa-vdpau-drivers mesa-va-drivers mesa-vdpau-drivers libdrm-radeon1'
 
 install=false
 for pkg in $pkgs; do
-  status="$(dpkg-query -W --showformat='${db:Status-Status}' "$pkg" 2>&1)"
-  if [ ! $? = 0 ] || [ ! "$status" = installed ]; then
-    install=true
-    break
-  fi
+    status="$(dpkg-query -W --showformat='${db:Status-Status}' "$pkg" 2>&1)"
+    if [ ! $? = 0 ] || [ ! "$status" = installed ]; then
+        install=true
+        break
+    fi
 done
 
 if "$install"; then
-   echo "**** Installing mesa ****"
-   apt-get update
-
-   apt-get install -y \
-   gpg
-
-   apt-key adv --keyserver keyserver.ubuntu.com --recv-keys F63F0F2B90935439
-   echo "deb http://ppa.launchpad.net/kisak/kisak-mesa/ubuntu focal main" > /etc/apt/sources.list.d/kisak-ubuntu-kisak-mesa-bionic.list
-
-   apt-get update
-
-   apt-get install -y $pkgs
+    echo "**** Installing mesa ****"
+    apt-key adv --keyserver keyserver.ubuntu.com --recv-keys F63F0F2B90935439
+    echo "deb http://ppa.launchpad.net/kisak/kisak-mesa/ubuntu focal main" > /etc/apt/sources.list.d/kisak-mesa-focal.list
+    apt-get update
+    apt-get install -y $pkgs
 fi