make archive.py runnable as package and as module

archivebox/__init__.py

@@ -0,0 +1,5 @@
+
+
+__name__ = 'archivebox'
+__package__ = 'archivebox'
+

archivebox/archive.py

@@ -8,6 +8,7 @@ but you can also run it directly using `python3 archive.py`
 Usage & Documentation:
     https://github.com/pirate/ArchiveBox/Wiki
 """
+__package__ = 'archivebox'
 
 import os
 import sys