Thoughts on omitting `for` and `keyFor`?

[Jordan Harband]

Symbol.for and Symbol.keyFor can't be shimmed cross-realm, which is one of its primary purposes.

What would you think about removing those methods entirely?

If not, then at least it should be a documented caveat in the README.

[Andrea Giammarchi]

will put them in the README too. Agreed, cross-realm is a whole new world of messness for any sort of polyfill.

[Andrea Giammarchi]

I've updated this and other caveats ... if that's OK for you please close this bug.

Thanks

[Jordan Harband]

Looks good, thanks