repl-docs: move file to tutorials

also add note for renderer processes.

docs/README.md

@@ -37,6 +37,7 @@ an issue:
 * [Quick Start](tutorial/quick-start.md)
 * [Desktop Environment Integration](tutorial/desktop-environment-integration.md)
 * [Online/Offline Event Detection](tutorial/online-offline-events.md)
+* [REPL](tutorial/repl.md)
 
 ## API References
 
@@ -65,7 +66,6 @@ an issue:
 * [powerMonitor](api/power-monitor.md)
 * [powerSaveBlocker](api/power-save-blocker.md)
 * [protocol](api/protocol.md)
-* [REPL](api/repl.md)
 * [session](api/session.md)
 * [systemPreferences](api/system-preferences.md)
 * [Tray](api/tray.md)

docs/tutorial/repl.md

@@ -18,4 +18,7 @@ The `repl` module provides a REPL implementation that can be accessed using:
   electron --interactive
   ```
 
+Note: This only creates a REPL for the main process. You can use the Console
+tab of the Dev Tools to get a REPL for the renderer processes.
+
 More info here: https://github.com/nodejs/node/blob/master/doc/api/repl.md