Use the build system “meson” (close #32)

Replace the build system “setuptools” with “meson”.

src/shortcutsdialog.py

@@ -0,0 +1,18 @@
+#!/usr/bin/env python3
+
+
+import gi
+gi.require_version('Gtk', '3.0')
+
+from gi.repository import Gtk
+
+
+
+
+@Gtk.Template(resource_path='/xyz/suruatoel/mcg/ui/shortcuts-dialog.ui')
+class ShortcutsDialog(Gtk.ShortcutsWindow):
+    __gtype_name__ = 'McgShortcutsDialog'
+
+
+    def __init__(self):
+        super().__init__()