[platform-update-dev] need an example for update api

[Vijayender <vijayender@xxxxxxxxxxxxxxxxxx>]

There is a steep curve in learning the Update api for me.
I will be thankful to you in suggesting me some examples that 
can make me walk through the minimum skelton of the api.
Or any other doccumentaion that will be useful in making it
easy for me to learn it.

Thanks in anticipation,
Vijayender