CSS and JS verisoning to prevent browser caching

[rs2487]

It should be possible to version assets like CSS and JS. The frontend coder should only have to edit a version number in a cental file. So that the person which updates the code on the server, dont need to update any files to publish the new version of the asset.

[danrot]

Looks like there is an open issue for that for quite a time: https://github.com/kriswallsmith/assetic/issues/116

However, maybe the following technique could be useful: http://stackoverflow.com/a/11682410/1292378 But only if we really version our projects...