Simple Hello World program that outputs "Hello World!" every five seconds to the serial debug port, and blinks at the user defined hertz.

Dependencies:   mbed-src

Revision:
0:4882b9e3f2cb
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-src.lib	Mon Jul 06 08:05:37 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed-src/#39197bcd20f2