Add simpler example

[seanchas116]

Add simpler and easy to understand example like https://github.com/seanchas116/node-tflite/issues/6#issuecomment-734071389

[jlarmstrongiv]

I polished the Lobe.ai tflite example from #6, and published it on github. Feel free to add it to the examples. For me personally, the challenge is getting the image to the tensor and having the right ArrayBuffer sizes. Adding #8 would make the examples much simpler.