vendors bundle should be hashed, but not cachebusted

[ghost]

The vendors bundle is now inside the versioned folder of the dist.

Users should not redownload it if it hasn't changed.

Could do a PR

[riccoarntz]

Can't think of a reason why we shouldn't do this.. 👍

[ThaNarie]

Not only the vendors, but all things that are built by webpack can have a hash appended in the filename, and should not be in the version folder.

The only thing that potentially could be copied over to the version folder are the static files (that are just copied over and directly referenced in our code (without webpack in between).

Note: when doing this, we might need to have a look at our deploytool, since cleanup of older versions becomes more difficult (keeping built-manifest, and only removing files that were not part of the last X builds).