Adds POST test for BMP280 sensor board. Includes driver

Dependencies:   BMP280 ELEC350-Practicals-FZ429 BME280

Fork of Task690-mbed-os-FZ429ZI by University of Plymouth - Stages 1, 2 and 3

Revision:
2:fad34c30dcc4
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sd-driver.lib	Wed Nov 22 15:18:28 2017 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/sd-driver/#ae7e7440054c9447f8255bdccbcc523b3f6dffe4