Update Visual Studio Code ignores

In Visual Studio Code 0.8.0, .settings is renamed to .vscode; adds
.vscode ignores to .gitignore with an override for tasks.json per microsoft#3156,
and removes vscode override for .settings

Author: Eyas

.gitignore

@@ -50,5 +50,6 @@ scripts/typings/
 coverage/
 internal/
 **/.DS_Store
-.settings/*
-!.settings/tasks.json
+.settings
+.vscode/*
+!.vscode/tasks.json