Use .NET 4.0 - fixes #160
Ignore test results file
Build via direct MSBuild call and override .NET version - references #160
RestorePackages finds the nuget.exe automatically
Use LoadReleaseNotes helper in build
Nuget task finds the nuget.exe automatically
FAKE detects the NUnit runner automatically
FAKE will kill the NUnit runner automatically
Make .NET 4.5 the default for development
Merge pull request #163 from forki/NET40

Use .NET 4.0 - fixes #160