Add a couple more public subdirectories on mesh clients

src/freedombone-image-mesh

         if [ ! -d /home/$MY_USERNAME/Public ]; then
             mkdir -p /home/$MY_USERNAME/Public/Videos
             mkdir -p /home/$MY_USERNAME/Public/Music
+            mkdir -p /home/$MY_USERNAME/Public/Podcasts
             mkdir -p /home/$MY_USERNAME/Public/Documents
+            mkdir -p /home/$MY_USERNAME/Public/Pictures
             echo $'Files within this directory will be publicly visible on the network' > /home/$MY_USERNAME/Public/README.txt
             chown -R $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/Public
             ln -s /home/$MY_USERNAME/Public /home/$MY_USERNAME/Desktop/Public