[gnome-shell] (15 commits) Non-fast-forward update to branch wip/hadess/welcome-tour

[Bastien Nocera <hadess src gnome org>]

The branch 'wip/hadess/welcome-tour' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  d3fd43f... welcomeDialog: Add “welcome” dialog
  bf6d001... main: Show welcome tour dialogue on first start

Commits added to the branch:

  bebd612... workspaceAnimation: Split from WindowManager (*)
  269c5ca... workspaceAnimation: Stop depending on shellwm (*)
  e32ec73... workspaceAnimation: Extract WorkspaceGroup (*)
  2f78d32... workspaceAnimation: Add to uiGroup insead of window_group (*)
  0f99d46... workspaceAnimation: Add a background (*)
  9cf300c... workspaceAnimation: Use window clones (*)
  ee55640... workspaceAnimation: Use a workspace strip (*)
  8eba759... workspaceAnimation: Group sticky windows and moving window (*)
  bca6548... workspaceAnimation: Support multiple screens (*)
  ae4dab7... workspaceAnimation: Disable unredirection during the gestur (*)
  9ce666a... workspaceAnimation: Move background to WorkspaceGroup (*)
  454394a... workspace: Handle window-added and removed signal after win (*)
  af8cc13... welcomeDialog: Add “welcome” dialog
  edf9a2d... util: Add a GNOME version comparison function
  2c82a4c... main: Show welcome tour dialogue on first start

(*) This commit already existed in another branch; no separate mail sent