Add some VS Code configuration

I typically use VS Code quite heavily, so I added some configuration
files to make it easier to work with.

This configuration exists for eons in my local setup, and it is high
time to share it with the world.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "editor.tabSize": 2
+}