Auto-generate a diff report between two exe versions

[monkeyman192]

Since we are going to be able to extract all the fields, we should be able to automatically generate a report which details what has changed with each release. This should be generated as a html doc for example and pushed to the gh-pages branch of this repo so that anyone can see the changes for every release (ideally we could potentially link this in the release itself)

This I think is a decently big task with a fair bit of scope, so this may end up getting broken up into a number of sub-tasks...