Merges from mainline

[brianmhunt]

This issue is just to link commits from knockout that ought to also be merged here.

[brianmhunt]

knockout/knockout#1975 knockout/knockout@eb88065

knockout/knockout#1974

[mbest]

Don't think this was meant to be closed

[brianmhunt]

Weird. Must've been by the commit message. Thanks.

[brianmhunt]

I'd say this is a dupe of #5, so closing