Step by Step show how to change the code into IDE.

Add step-by-step action into the file README. The adding will simply
and short your time of intergrate the source code into your IDE.

Signed-off-by: Jason Luan <luanjianhai@gmail.com>
Add the SoS function

Add SOS function into app. Only add onClick() function in Listener
to change ContentView text.

Signed-off-by: Jason Luan <luanjianhai@gmail.com>