Updated the cache directories in AppVeyor
Updated the cache directories in AppVeyor

I've set C:\Users\appveyor\AppData\Local\NuGet\Cache as a cached directory, as per http://help.appveyor.com/discussions/problems/839-repeated-build-failures-due-to-nuget-package-restore-timeouts
FinnAngelo/Abecedary,FinnAngelo/AbecedarianKata,FinnAngelo/Abecedary,FinnAngelo/AbecedarianKata