Railway Challenge / Mbed 2 deprecated challenge

Uncommenting of part that allow supercaps to charge up from the batteries

Dependencies:   mbed millis

Diff: millis.lib

Revision:
0:4788e1df7b55
diff -r 000000000000 -r 4788e1df7b55 millis.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/millis.lib	Fri Mar 13 11:48:04 2020 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/users/hudakz/code/millis/#ac7586424119