Tweeks to nuspecs.
Re-enable old nuget package restore. It's the only way I can get it to work on AppVeyor :|
Revert "Re-enable old nuget package restore. It's the only way I can get it to work on AppVeyor :|"

This reverts commit beee131715dd721efa933a18e170afa270bca264.
Update build scripts to work with AppVeryor
Add nuget.exe and solution packages.config
Solution package restore and fix Documentation filename