Convert from CSS to SCSS. Make a multitude of refinements to styling along the way.

Remove unused glade UI file. Added CSS classes to various components. Fix some alignment issues. Renamed our albums_strip to favorites_list.

Implement recursive file parsing in KotoIndexedAlbum with the intent of using it for "discs" / CD, useful for albums like Foo Fighters: In Your Honor that have 2 or more CDs. Still need to work on refining this further.

Add stub function in our album view for a planned separation of the track listing so we can do it based on discs and other depth-of-3 sub-folders.

src/main.c

@@ -42,6 +42,7 @@ int main (int argc, char *argv[]) {
 	bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
 	textdomain (GETTEXT_PACKAGE);
 
+	gtk_init();
 	app = gtk_application_new ("com.github.joshstrobl.koto", G_APPLICATION_FLAGS_NONE);
 	g_signal_connect (app, "activate", G_CALLBACK (on_activate), NULL);
 	ret = g_application_run (G_APPLICATION (app), argc, argv);