Add tasks for all the new languages

Task/Quickselect-algorithm/Ring/quickselect-algorithm.ring

@@ -0,0 +1,20 @@
+aList = [9, 8, 7, 6, 5, 0, 1, 2, 3, 4]
+see partition(aList, 9, 4, 2) + nl
+
+func partition list, left, right, pivotIndex
+     pivotValue = list[pivotIndex]
+     temp = list[pivotIndex]
+     list[pivotIndex] = list[right]
+     list[right]  = temp
+     storeIndex = left
+     for i = left to right-1
+         if list[i] < pivotValue
+            temp = list[storeIndex]
+            list[storeIndex] = list[i]
+            list[i] = temp
+            storeIndex++ ok
+         temp = list[right]
+         list[right] = list[storeIndex]
+         list[storeIndex] = temp
+     next
+     return storeIndex