Write instructions to set up project without using eclipse

[markfguerra]

As of now the readme.txt file contains instructions for users to create a new wallpaper project using Eclipse.
https://github.com/markfguerra/GLWallpaperService/blob/e88eda8f665c34da544a460b3b1c41d481c98bb4/readme.txt

The task is to write clear step by step instructions on how to set up a new wallpaper project using the command line. It should have no dependancy on Eclipse.

You can leave out any standard sdk setup instructions. Google publishes that document at http://developer.android.com/sdk/installing.html