mbed_app.json configured to operate on senet

To enable cayenne, edit mbed_app.json, assign pins for desired function

Example:

        "cayenne": {
            "help": "compile main_cayenne.cpp instead of main.cpp",
            "value": 1
        },
        "analog_in_pin": {
            "help": "PA_0, PA_4, PA_5",
            "value": "PA_0"
        },
        "analog_out_pin": {
            "help": "PA_0, PB_5, PB_10, PB_11",
            "value": "PB_11"
        },
        "_digital_out_pin": {
            "help": "",
            "value": ""
        }
Revision:
52:1bd775571014
Parent:
46:a124538e2891
Child:
55:6f2e16ebde99
--- a/README.md	Wed Apr 10 13:01:55 2019 +0100
+++ b/README.md	Mon Apr 29 14:02:07 2019 +0100
@@ -171,3 +171,11 @@
  
 
 For more information, please follow this [blog post](https://os.mbed.com/blog/entry/Reducing-memory-usage-by-tuning-RTOS-con/).
+
+
+### License and contributions
+
+The software is provided under Apache-2.0 license. Contributions to this project are accepted under the same license. Please see [contributing.md](CONTRIBUTING.md) for more info.
+
+This project contains code from other projects. The original license text is included in those source files. They must comply with our license guide.
+