Few tweaks to support case sensitive filesystems

find -name "*.nuspec" -print | xargs sed -i 's/NET20/Net20/g'
find -name "*.nuspec" -print | xargs sed -i 's/NET40/Net40/g'
find -name "*.fsproj" -print | xargs sed -i 's/nuget.targets/NuGet.targets/g'