Add Number macro

[mriska]

Would you be open to support an number macro which wraps https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number?

I found myself writing the following code today:

colspan: sum(collect(7, number('fooVisible'), number('barVisible')))

I basically used the number macro to turn a boolean into 1 or 0. I know that it would have been done implicitly via coercion, but feel that being explicit about it might be kind on the future reader of the code.

If you feel this is a worthwhile addition, where do we place it in the documentation - under Number?

[kellyselden]

Sounds good under the number section.