Add a warning for the lein repl task.

bin/lein

@@ -59,6 +59,11 @@ for ARG in "$@"; do
 done
 
 if [ "$1" = "repl" ]; then
+    echo "Warning: the repl task currently doesn't honor some project.clj"
+    echo "options due to I/O stream issues. Future versions will address"
+    echo "this, but for now you will get more consistent behaviour from repls"
+    echo "launched by either the lein-swank plugin or the lein-nailgun plugin."
+    echo
     $RLWRAP java -client $JAVA_OPTS -cp "src/:classes/:$CLASSPATH" jline.ConsoleRunner clojure.main ${@:2}
 elif [ "$1" = "self-install" ]; then
     if [[ $VERSION == *SNAPSHOT ]]; then