comment tweaks, provide CLEAN option to stack.sh
diff --git a/build_lxc.sh b/build_lxc.sh
index d3dd7ad..5e07b1a 100755
--- a/build_lxc.sh
+++ b/build_lxc.sh
@@ -77,7 +77,7 @@
     cp -pr ~/.bashrc $ROOTFS/opt/.bashrc
 fi
 
-# give stack ownership over /opt so it may do the work needed
+# Give stack ownership over /opt so it may do the work needed
 chroot $ROOTFS chown -R stack /opt
 
 # Configure instance network