Switch the Game of Life tutorial over to using rustwasm/rust_wasm_template

[fitzgen]

This would involve:

1. Checking out the rustwasm/wasm_game_of_life repo's chapter-zero branch, and merging rustwasm/rust_wasm_template's master branch. This will involve resolving a bunch of conflicts.

2. Merging chapter-zero into chapter-one, etc. and making pull requests to rustwasm/rust_wasm_template for each of them.

3. Rewriting the relevant snippets of the game of life tutorial text to refer to cloning the rustwasm/rust_wasm_template.

Happy to help someone who wants to try their hand at this :)

[mgattozzi]

Might have my mentees take a crack at this during the impl Days at RustFest tomorrow/tuesday

[mgattozzi]

Hey @fitzgen @nanoplink is taking this issue. We're aiming to have this done by Friday!

[jrichocean]

This issue has been moved to here