Changes:

* Stop producing Microsoft.AspNetCore.Routing.DecisionTree.Sources. I could not find any usages outside of the Microsoft.AspNetCore.Routing assembly, so I've moved this to be a subfolder of code in the Microsoft.AspNetCore.Routing project.
* Stop building src/Routing as a submodule. Use ProjectReference instead
* Move projects from src/Routing into src/Http/Routing/ and src/Http/Routing.Abstractions/
* Update package baselines and dependencies to support building routing projects and samples

- Stop producing the 'Universe' lineup package
- Removes all PackageLineup code
- Use full msbuild on Windows
- Fix invalid reference to internal.aspnetcore.sdk in 2.1.x
- Fix shared folder references for PackageArchive task.

[auto-updated: buildtools]

EntityFrameworkCore => d53e0ab01598cb05592aee7809e16d6bf55a4e14

[auto-updated: submodules]

Prior to reorganization, this source code was found in https://github.com/aspnet/Identity/tree/fa3cfd08eb6af819adc5fef2d9b603638c4b4b3b

Prior to reorganization, this source code was found in https://github.com/aspnet/Localization/tree/0bcac31dd705fb9db60723f5d7eaeffb728358f5

Prior to reorganization, this source code was found in https://github.com/aspnet/BasicMiddleware/tree/1de636cd18309070792b68888ca29c8b85fac98b

Prior to reorganization, this source code was found in https://github.com/aspnet/Razor/tree/fd4572874e41ca3af803b0b2c71955505dd4bde5

Prior to reorganization, this source code was found in https://github.com/aspnet/MvcPrecompilation/tree/617586a984b1eff9ca0ca8126dd0b1dab2ea16f2

Prior to reorganization, this source code was found in https://github.com/aspnet/Mvc/tree/5a4fd3e792e75619e3b1de069fabdf87d2cd0983

Prior to reorganization, this source code was found in https://github.com/aspnet/SignalR/tree/bc148a07244a451e48b7e0efdf16db8f69f788ff