Update NuGet packages.
Microsoft.Bcl 1.1.3 -> 1.1.9
Microsoft.Bcl.Build 1.0.10 -> 1.0.21
Microsoft.Net.Http 2.2.18 -> 2.2.28
Remove NuGet.exe and NuGet.targets.
Create README.md
Update README.md
Merge branch 'master' of https://github.com/henricj/MemoryWoes.git