Move "clapper_src" dir to "src"

The "clapper_src" directory name was unusual. This was done to make it work as a widget for other apps. Now that this functionality got removed it can be named simply "src" as recommended by guidelines.

src/appRemote.js

@@ -0,0 +1,21 @@
+const { GObject } = imports.gi;
+const { AppBase } = imports.src.appBase;
+const { HeaderBarBase } = imports.src.headerbarBase;
+const { WidgetRemote } = imports.src.widgetRemote;
+
+var AppRemote = GObject.registerClass(
+class ClapperAppRemote extends AppBase
+{
+    vfunc_startup()
+    {
+        super.vfunc_startup();
+
+        const clapperWidget = new WidgetRemote();
+        this.active_window.set_child(clapperWidget);
+
+        const headerBar = new HeaderBarBase(this.active_window);
+        this.active_window.set_titlebar(headerBar);
+
+        this.active_window.maximize();
+    }
+});