Feature request: add a timestamp to a file named VERSION_TIMESTAMP

[feliperaul]

It would be very nice to have a timestamp added somewhere. For instance, a VERSION_TIMESTAMP alongside the VERSION file.

Use case: I wished to display at the footer of my Rails app the current app release version and release date/time. It would be very usefull to parse Rails.root/VERISON_TIMESTAMP to load that info into a constant on app initialization.

[grosser]

how about showing the VERSION in the footer, isn't that the same ?
... alternatively the file-system change-time of the VERSION file or the git change-time of VERSION file (since bump generates a commit)