Use util-format-x for util.format and util.formatWithOptions

[niftylettuce]

Pending the resolution of Xotic750/util-format-x#2, we should use that package as it is the most up to date util.format implementation for the browser.

[niftylettuce]

It's actually pretty huge in size, so maybe not.

[benkeil]

Why not just use the NodeJS implementation?

[niftylettuce]

Browser support needed