Adjust naming.

src/wallman.py

@@ -0,0 +1,12 @@
+#!/usr/bin/env python3
+import wallman_lib
+
+def main():
+    validator = wallman_lib.ConfigValidity()
+    logic = wallman_lib.WallpaperLogic()
+    validator.validate_config()
+    logic.set_wallpaper_by_time()
+    logic.schedule_wallpapers()
+
+if __name__ == "__main__":
+    main()