Add and use new logger

This helps provider better logs.  With this, the user can now run
with `-v` for verbose logs, use more `-v` to be more verbose,
eg `calls -vvvvv` log shall be very verbose

src/main.c

@@ -26,6 +26,7 @@
 #include <gtk/gtk.h>
 
 #include "calls-application.h"
+#include "calls-log.h"
 #include "config.h"
 
 int
@@ -39,6 +40,8 @@ main (int    argc,
   bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
   bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
 
+  calls_log_init ();
+
   app = G_APPLICATION (calls_application_new ());
   status = g_application_run (app, argc, argv);
   g_object_unref (app);