Updated project file

Author: kevingoos

GPS.NET/GPS.NET.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 14
-VisualStudioVersion = 14.0.25420.1
+# Visual Studio 15
+VisualStudioVersion = 15.0.27428.2037
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Ghostware.GPS.NET", "Ghostware.GPS.NET\Ghostware.GPS.NET.csproj", "{CFBDB710-C75D-4DDF-94D2-8855FA6F9F07}"
 EndProject
@@ -70,4 +70,7 @@ Global
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {6450ED75-69E6-4017-ACE0-C5BB0BC1076F}
+	EndGlobalSection
 EndGlobal