Add tasks for all the new languages

Task/Binary-digits/Ring/binary-digits.ring

@@ -0,0 +1,12 @@
+see "Number to convert : "
+give a
+n = 0
+while pow(2,n+1) < a
+      n = n + 1
+end
+
+for i = n to 0 step -1
+    x = pow(2,i)
+    if a >= x see 1 a = a - x
+    else see 0 ok
+next