don't clone if it exists

hub.ios.install.sh

@@ -27,7 +27,9 @@ mkdir -p ~/git.ppl.family/ppl
 pushd ~/git.ppl.family/ppl/
 
   # ~/git.ppl.family/ppl/
-  git clone https://git.ppl.family/ppl/ppl.ios.git
+  if [ ! -e ppl.ios ]; then
+    git clone https://git.ppl.family/ppl/ppl.ios.git
+  fi
 
   pushd ./ppl.ios/