Update Microsoft Azure settings. See github/gitignore#1815

This commit update file state with upstream project.
Thanks!

Author: peterblazejewicz

templates/gitignore.txt

@@ -152,12 +152,17 @@ publish/
 # Uncomment if necessary however generally it will be regenerated when needed
 #!**/packages/repositories.config
 
-# Windows Azure Build Output
+# Microsoft Azure Build Output
 csx/
 *.build.csdef
 
+# Microsoft Azure Emulator
 ecf/
 rcf/
+
+# Microsoft Azure ApplicationInsights config file
+ApplicationInsights.config
+
 # Windows Store app package directory
 AppPackages/