Move file to src/ and rename for packaging

wallman.py

@@ -1,12 +0,0 @@
-#!/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()