Gzip bundles (Closes #96)

I could be convinced to go back to using `node-fstream` as switching to `node-archiver` didn't save much, if any, effort.
I embarked on this journey assuming it was possible. And I'm not unconvinced it is but I spent a silly amount of time trying. TL;DR I'd love help with this, you can see my best attempt here:

https://github.com/Versal/sdk/compare/62313ce33d5ac753885566df8a1c4fbb8980aeb4...f2c850a?expand=1

See this if you want to read more about my trials and tribulations:

https://github.com/Versal/sdk/pull/101