add lib

Dependencies:   Adafruit_FeatherOLED USBDevice max32630fthr pms1003

Fork of FTHR_OLED by Greg Steiert

Revision:
4:83fd5be9dab7
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Fri Feb 03 23:14:57 2017 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/mbed-os/#269f58d75b752a4e67a6a2d8c5c698635ffd6752