[feature request] Show JavaScript preview for edited coffee file

[paulvi]

It would be nice to view edited .coffee file or files in a tree with quick JavaScript View.

While to find Coffee->JS tool should not be problem, finding one that could do that in stealth mode, very often and without CPU overhead.

[paulvi]

This may be related to Nodeclipse/nodeclipse#57 "running app.js with node-dev, forever etc". Because if coffee app was started with node-dev/forever, the tool will keep JS file updated whenever Coffee file is saved. So in this case the best solution would be just to show existing JS file that is used.