[TYPO3-project-4-3] copy all JS code to typo3temp

[Martin Kutschker]

Hi!

What!?! Why!??! So you don't have to tell every use to clear the browser
cache after an upgrade.

Every JS file will be copied transparently to typo3temp/js_<versionid>/,
so neither the developers nor the admins and users have to worry. The
versionid could either be the real version number or a hash (in case
we're worried to disclose the version number).

Masi