D7173: packaging: stage files and dynamically generate WiX installer

[indygreg (Gregory Szorc)]

indygreg added a comment.


  This has been rebased and all dependent commits have landed. Please take another look, @durin42.

REPOSITORY
  rHG Mercurial

CHANGES SINCE LAST ACTION
  https://phab.mercurial-scm.org/D7173/new/

REVISION DETAIL
  https://phab.mercurial-scm.org/D7173

To: indygreg, #hg-reviewers, durin42
Cc: durin42, mercurial-devel