move the markdown.py file to __main__.py

url2markdown/__main__.py

@@ -1,13 +1,12 @@
 #!/usr/bin/env python
-from cli import cli
-from downloader import downloader
-from file import write_to_file
-from header import Header
+from url2markdown.cli import cli
+from url2markdown.downloader import downloader
+from url2markdown.file import write_to_file
+from url2markdown.header import Header
 
 
 def main():
     args = cli()
-    print(args.topics)
     article = downloader(args.URL)
     header = Header(article, args.topics)
     write_to_file(article, header.build_header())