Fake screenshot generation

[daniel-luper]

Note: it's required to complete issue #1 first.

Description

Write a function that takes in two images (a smaller foreground image, and a larger background image) and outputs a new image.
The new image will consist of the foreground image placed at a random location and scale on top of the background image.
The coordinates and size of the foreground image will also be outputted.

Purpose

By feeding scrambled chessboard images alongside miscellaneous pictures into this function, we can get the "fake screenshots" needed to train an image recognition AI.