fix: dev: ImportError on python2 (#42)

Author: rachmadaniHaryono

google_images_download/__init__.py

@@ -1,5 +1,9 @@
+#!/usr/bin/env python
+from __future__ import absolute_import
+
+
 def main():
     import google_images_download.google_images_download
 
 if __name__ == '__main__':
-    main()
+    main()

google_images_download/__main__.py

@@ -0,0 +1,7 @@
+#!/usr/bin/env python
+from __future__ import absolute_import
+
+from .__init__ import main
+
+if __name__ == '__main__':
+    main()