Provide Android specific example

Per the suggestion in [this thread](https://github.com/square/dagger/issues/142#issuecomment-12303145) moved the Java example to an `examples` folder, and created an Android example along side. Also created the necessary pom for the Android example. 

I tried to use the same theme as the Dagger webpage, so you'll notice I incorporated the same background image, and color scheme.