Stage-1 Students SoCEM / Mbed OS Task616-mbedos54

Converts keystrokes to Morse code - Morse is transmitted on a background thread. updated for mbed os 5.4

Diff: mbed-os.lib

Revision:
4:1c9fde2d3d2d
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Thu Mar 30 14:28:41 2017 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/mbed-os/#50b3418e45484ebf442b88cd935a2d5355402d7d