add clojure sample

samples/java/clojure/simple-sample/src/simple_sample/core.clj

@@ -0,0 +1,16 @@
+;;; to run this code from the terminal: "$ lein run". It will save a
+;;; blurred image version of resources/images/lena.png as
+;;; resources/images/blurred.png
+
+(ns simple-sample.core
+  (:import [org.opencv.core Point Rect Mat CvType Size Scalar]
+           org.opencv.highgui.Highgui
+           org.opencv.imgproc.Imgproc))
+
+(defn -main [& args]
+  (let [lena (Highgui/imread "resources/images/lena.png")
+        blurred (Mat. 512 512 CvType/CV_8UC3)]
+    (print "Blurring...")
+    (Imgproc/GaussianBlur lena blurred (Size. 5 5) 3 3)
+    (Highgui/imwrite "resources/images/blurred.png" blurred)
+    (println "done!")))