Add tasks for all the new languages

Task/Remove-duplicate-elements/Ring/remove-duplicate-elements.ring

@@ -0,0 +1,11 @@
+list = ["Now", "is", "the", "time", "for", "all", "good", "men", "to", "come", "to", "the", "aid", "of", "the", "party."]
+for i = 1 to len(list)
+    for j = i + 1 to len(list)
+        if list[i] = list[j] del(list, j) j-- ok
+    next
+next
+
+for n = 1 to len(list)
+    see list[n] + " "
+next
+see nl