(maint) install absolute latest script uses local 7z

 - This ensures installabsolutelatest.ps1 does the same thing as install.ps1
(infra) include items for change

 - Controllers/PackagesController.cs
 - Services/IMessageService.cs
 - Services/MessageServices.cs
(infra) included RouteNames.cs for change
(GH-3) Implement a donate button
(GH-81) Update routes to include About route

 - adding infrastructure for the about route.
(GH-71) Add a contact admins page

  - This adds a way for folks to contact the site administrators with different
   wording than the report abuse link that is currently used for these items.
  - Also fix the annoying fact that packages don't include the url to the darn
   package.