Creating nuspec file from Klarna.Kco.csproj

Bumping version

MINT-1435
Correcting links
Adding icon and more tags to nuspec file
Merge pull request #2 in MINT/dotnet-checkout from MINT-1435_nuget_package to v1.0

* commit 'fd21588b73bc3894eb796dce4c18e656a0d0fa9c':
  Adding icon and more tags to nuspec file
  Correcting links
  Creating nuspec file from Klarna.Kco.csproj