Added SF sln for gruping all sf projects

ServiceFabric/Windows/sfwin.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.27323.2
+MinimumVisualStudioVersion = 10.0.40219.1
+Global
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {04B6E659-060F-4550-A5CA-70B9E9D8F010}
+	EndGlobalSection
+EndGlobal