Idea on how to achieve Get-Save-Reordering: optimize/change the AST.
Internally available now: Sleep_ms Token.

Needed for AST-change for Downloading more than one document:
Goal is to change the AST from
  "Get-Array/List followed by Save-Array/-List"
to
."(Get-and-Save)-Array/-List".
Sleep_ms token is needed to allow these transformation,
and have the Sleep-ms-Option in between.
So, the transformation is moire precisely to "(Get-Sleep_ms-Save)-Array-/List"
get-function now prints each URL, it tries to download. (in general, not only in verbose-mode)