ocarina: Add settings button

Right now, clicking the button will print out some text.  I'll
eventually have it open a new tab for configuring Ocarina.

ocarina/body/button.py

@@ -94,6 +94,12 @@ def save_button(show):
 			export.save_playlist(loc)
 	return make_button(gtk.STOCK_SAVE, save_func, "Save Current Playlist", show)
 
+def prefs_button(show):
+	def prefs_func():
+		from ocarina import settings
+		settings.show_page()
+	return make_button(gtk.STOCK_PREFERENCES, prefs_func, "Modify Settings", show)
+
 def up_button(show):
 	def up_func():
 		from ocarina.body import footer

ocarina/body/header/__init__.py

@@ -20,6 +20,7 @@ def add_button(name, button):
 header_body.pack_start(entry.entry)
 add_button(  "OPEN", button.open_button(True))
 add_button(  "SAVE", button.save_button(True))
+add_button( "PREFS", button.prefs_button(True))
 
 sep = gtk.VSeparator()
 sep.show()

ocarina/settings/__init__.py

@@ -0,0 +1,5 @@
+# Bryan Schumaker (6 / 18 / 2011)
+
+
+def show_page():
+	print "Showing settings page!"