Merge pull request #1632 from khellang/ghostdoc

Add VisualStudio GhostDoc plugin setting file

VisualStudio.gitignore

@@ -199,6 +199,9 @@ UpgradeLog*.htm
 # Microsoft Fakes
 FakesAssemblies/
 
+# GhostDoc plugin setting file
+*.GhostDoc.xml
+
 # Node.js Tools for Visual Studio
 .ntvs_analysis.dat