wixtoolset/wix4 — pull request #21 by robmen (2014-09-10 21:02:45+00:00)
Title: Replace devenv /setup call with fast extension update mechanism.

The devenv /setup call when installing the WiX toolset can take minutes
to complete. Fortunately the VSIX installation method introduced
another way to complete the registration of extensions. All that is
necessary is to touch the "extensions.configurationchanged" file.