Removed Sandbox\ directory from solution as it's not present in github.
Revert "Removed Sandbox\ directory from solution as it's not present in github."

This reverts commit c6919f43406e32c9582797bc96c46b4f3516ec92.
Removed Sandbox/ from the .sln because it's not present in github.
Merge pull request #13 from philiptromans/master

Missing project in .sln file.