Mostly docs cleanups

Fix documentation build errors and RST formatting

Change-Id: Id93153400c5b069dd9d772381558c7085f64c207
diff --git a/unstack.sh b/unstack.sh
index c45af74..30981fd 100755
--- a/unstack.sh
+++ b/unstack.sh
@@ -19,7 +19,7 @@
     esac
 done
 
-# Keep track of the current devstack directory.
+# Keep track of the current DevStack directory.
 TOP_DIR=$(cd $(dirname "$0") && pwd)
 FILES=$TOP_DIR/files