Add all the A tasks

Task/Anonymous-recursion/Lua/anonymous-recursion-1.lua

@@ -0,0 +1,7 @@
+local function Y(x) return (function (f) return f(f) end)(function(y) return x(function(z) return y(y)(z) end) end) end
+
+return Y(function(fibs)
+  return function(n)
+    return n < 2 and 1 or fibs(n - 1) + fibs(n - 2)
+  end
+end)

Task/Anonymous-recursion/Lua/anonymous-recursion-2.lua

@@ -0,0 +1,4 @@
+return setmetatable({1,1},{__index = function(self, n)
+  self[n] = self[n-1] + self[n-2]
+  return self[n]
+end})