Steal pranav's clever bash script to pull universal parameters

.circleci/leo-new.sh

@@ -1,15 +1,25 @@
-# Create a new Leo program named `foo`.
-$LEO new foo
-ls -la
-cd foo && ls -la
 
-# Try to run `leo build`.
-(
-  $LEO build || exit
-)
+echo "
+Step 4: Downloading parameters. This may take a few minutes..."
 
+# Create a new dummy Leo project.
+$LEO new dummy > /dev/null 2>&1 && cd dummy
+
+# Attempt to compile the dummy program until it passes.
+# This is necessary to ensure that the universal parameters are downloaded.
+declare -i DONE
+
+DONE=1
+
+while [ $DONE -ne 0 ]
+do
+      $LEO build > /dev/null 2>&1
+      DONE=$?
+      sleep 0.5
+done
 
 # Try to run `leo run`.
-(
-  $LEO run || exit
-)
+$LEO run || exit
+
+# Remove the dummy program.
+cd .. && rm -rf dummy