Feature request: auto-close math environments opened with \( or \[

[phlippieb]

As someone writing a document with many mathematical formulas, I would love it if, when I type \( or \[, atom would add \) or \] after my cursor, similarly to how a simple ( is often auto-closed with a ) after the cursor in other languages. Does that fall within the scope of this package?

[Evpok]

The feature certainly doesn't feel out-of-place, let's push it in the queue.