Added "Solution Items" folder to the VS solution

Author: leekelleher

src/Our.Umbraco.DocTypeGridEditor.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 2013
-VisualStudioVersion = 12.0.21005.1
+# Visual Studio 14
+VisualStudioVersion = 14.0.25420.1
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Our.Umbraco.DocTypeGridEditor", "Our.Umbraco.DocTypeGridEditor\Our.Umbraco.DocTypeGridEditor.csproj", "{4BD1DB40-1B39-4966-8740-D6A39D658598}"
 EndProject
@@ -29,6 +29,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Build Package", "Build Pack
 		..\build\readme.txt = ..\build\readme.txt
 	EndProjectSection
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{8412A31B-D80C-42DE-9589-4BD08F43F86B}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -43,4 +45,9 @@ Global
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
+	GlobalSection(NestedProjects) = preSolution
+		{CEE9961C-D747-40CD-B0B2-868D6B46833E} = {8412A31B-D80C-42DE-9589-4BD08F43F86B}
+		{D588B45D-9E67-4136-8271-2B8724C8165F} = {8412A31B-D80C-42DE-9589-4BD08F43F86B}
+		{42CE1449-272B-453B-B162-4558FD38BF41} = {8412A31B-D80C-42DE-9589-4BD08F43F86B}
+	EndGlobalSection
 EndGlobal