Momo-Medical / Mbed 2 deprecated SDFileSystem_Heavy

pls work

Dependencies:   mbed WS2813 PixelArray SDFileSystem ds3231

Fork of SDFileSystem_HelloWorld by Neil Thiessen

Diff: ds3231.lib

Revision:
27:2b989633a518
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ds3231.lib	Tue Jan 15 13:05:29 2019 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/teams/Maxim-Integrated/code/ds3231/#11630748e2f2