this works for reading in data from pi via usb

Revision:
91:3a205782066a
Parent:
85:b4c5dbbf74e3
--- a/CONTRIBUTING.md	Thu Jan 17 09:00:02 2019 +0000
+++ b/CONTRIBUTING.md	Wed Feb 13 18:24:11 2019 +0000
@@ -2,4 +2,4 @@
 
 Mbed OS is an open-source, device software platform for the Internet of Things. Contributions are an important part of the platform, and our goal is to make it as simple as possible to become a contributor.
 
-To encourage productive collaboration, as well as robust, consistent and maintainable code, we have a set of guidelines for [contributing to Mbed OS](https://os.mbed.com/docs/latest/reference/contributing.html).
+To encourage productive collaboration, as well as robust, consistent and maintainable code, we have a set of guidelines for [contributing to Mbed OS](https://os.mbed.com/docs/mbed-os/latest/contributing/index.html).