Add Evaluate One Liners With lein-exec as a clojure til.

clojure/evaluate-one-liners-with-lein-exec.md

@@ -0,0 +1,10 @@
+# Evaluate One Liners With lein-exec
+
+You can install the [`lein-exec`](https://github.com/kumarshantanu/lein-exec)
+plugin and then use it to evaluate one liner bits of code with the `-e`
+flag.
+
+```bash
+$ lein exec -e '(println "foo" (+ 20 30))'
+foo 50
+```