Fix requires in todo.ws

Missing from my 2.2.1 pull request.
Thanks @mascarenhas for manually merging, and @petsagouris for your feedback.
Storms and many downed trees here this weekend have taken out my broadband, so have only very limited connectivity and couldn't rebase my repo - hope you can manually merge this before release (and fix char-encoding error in gh-pages / docs as spotted by @petsagouris).
Cheers!