ocarina: Create initial namespace

Namespaces make code easier to follow, and remove the need to mangle the
beginning of function names by using ocarina_*() or libsaria_*().  In
other words: "namespaces are one honking good idea.  Let's have more of
them!"

include/ocarina/ocarina.h

@@ -1,7 +1,12 @@
 #ifndef OCARINA_H
 #define OCARINA_H
 
-void ocarina_quit();
+namespace ocarina
-void ocarina_idle_add();
+{
+
+	void quit();
+	void idle_add();
+
+};
 
 #endif

ocarina/callback.cpp

@@ -25,7 +25,7 @@ void cb_pause()
 void cb_idle_task_queued()
 {
 	println("Ocarina IDLE_TASK_QUEUED callback!");
-	ocarina_idle_add();
+	ocarina::idle_add();
 }
 
 void cb_library_refresh()

ocarina/ocarina.cpp

@@ -12,19 +12,22 @@
 #include <libsaria/print.h>
 #include <libsaria/idle.h>
 
-static gboolean ocarina_idle(gpointer data)
+namespace ocarina
+{
+
+	static gboolean idle(gpointer data)
 	{
 		if (libsaria::idle::run_task() == 0)
 			return FALSE; /* There are no idle events left */
 		return TRUE; /* Process remaining idle events */
 	}
 
-void ocarina_idle_add()
+	void idle_add()
 	{
-	g_idle_add(ocarina_idle, NULL);
+		g_idle_add(idle, NULL);
 	}
 
-void ocarina_init(int argc, char **argv)
+	void init(int argc, char **argv)
 	{
 		window_init("Ocarina " + vers_str(), "images/ocarina.png");
 		window_add(get_tabs());
@@ -32,11 +35,13 @@ void ocarina_init(int argc, char **argv)
 		settings_init();
 	}
 
-void ocarina_quit()
+	void quit()
 	{
 		gtk_main_quit();
 	}
 
+}
+
 int main(int argc, char **argv)
 {
 	println("Ocarina " + vers_str());
@@ -44,7 +49,7 @@ int main(int argc, char **argv)
 	libsaria::init(argc, argv);
 	setup_callbacks();
 	gtk_init(&argc, &argv);
-	ocarina_init(argc, argv);
+	ocarina::init(argc, argv);
 
 	if (argc > 1)
 		libsaria::audio::load(argv[1]);

ocarina/window.cpp

@@ -10,7 +10,7 @@ static GtkWidget *window;
 
 void destroy_window(GtkWidget *widget, GdkEvent *event, gpointer data)
 {
-	ocarina_quit();
+	ocarina::quit();
 }
 
 void window_resize(int w, int h)