Xiaoyuan Yu / Mbed 2 deprecated stepper_sample

sample for my stepper lib https://os.mbed.com/users/Dennis_Yu/code/stepper/

Dependencies:   mbed stepper

Diff: stepper.lib

Revision:
0:4324116dc48b
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/stepper.lib	Fri Jul 27 11:47:58 2018 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/users/Dennis_Yu/code/stepper/#94661b4fa780