Add tasks for all the new languages

Task/Knuth-shuffle/Ring/knuth-shuffle.ring

@@ -0,0 +1,16 @@
+a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+shuffle(a)
+for n = 1 to len(a)
+    see "" + a[n] + " "
+next
+
+func shuffle t
+     n = len(t)
+     while n > 1
+           k = random(n-1)+1
+           temp = t[n]
+           t[n] = t[k]
+           t[k] = temp
+           n = n - 1
+     end
+     return t