Changed a .gitignore file

Author: Taritsyn

.gitignore

@@ -5,19 +5,18 @@
 # Node.js tools
 bower_components/
 node_modules/
+package-lock.json
 
-# Client side components
-**/JavaScriptEngineSwitcher.Sample.AspNet4.Mvc4/lib/
-**/scripts/build/
-**/styles/build/
-**/wwwroot/lib/
+# BenchmarkDotNet artifacts
+BenchmarkDotNet.Artifacts/
 
 ## Ignore Visual Studio temporary files, build results, and
 ## files generated by popular Visual Studio add-ons.
 
 # User-specific files
 .vs/
 .vscode/
+.idea/
 *.sln.docstates
 *.suo
 *.user
@@ -59,7 +58,8 @@ PublishProfiles/
 
 # NuGet Packages
 packages/
-nuget/
+*.nupkg
+*.snupkg
 
 # Others
 .build/
@@ -79,4 +79,10 @@ Backup*/
 UpgradeLog.htm
 UpgradeLog*.XML
 
-.idea
+# Current project-specific folders and files
+nuget/
+**/JavaScriptEngineSwitcher.Benchmarks/Files/template-rendering/lib/*.min.js
+**/JavaScriptEngineSwitcher.Sample.AspNet4.Mvc4/lib/
+**/scripts/build/
+**/styles/build/
+**/wwwroot/lib/