docs: update README.md

Update README file for submission to openembedded.

Signed-off-by: Paul Barrette <[email protected]>

Author: element-82

README.md

@@ -1,2 +1,23 @@
-# meta-device-cloud
-Wind River® Helix™ Device Cloud Yocto layer 
+Description
+===========
+Device Cloud (DC) is a cloud/device platform that accelerates
+device to cloud and cloud to cloud interaction.  This meta layer integrates
+a Python implementation that is designed to be run on the device side and can be
+used for device actuation, management, sending telemetry, remote
+console etc.
+
+The Python agent for DC is designed for quick deployment on any
+platform that supports Python.  The continuous deployment model uses
+"pip" to install and update the latest modules.  Any application that
+wants to use DC cloud services can import the "device_cloud" module and
+begin using the DC APIs.
+
+Requirements:
+-------------
+meta-device-cloud layer depends on:
+    * meta-python layer
+    * meta-openembedded layer
+    * openembedded layer
+    * meta-intel (if an Intel BSP is required)
+
+For Yocto details see README.yocto.md