renamed main python file to __main__.py so we can run with python -m dokos ...

README.md

@@ -22,6 +22,12 @@ You can now use with
 dokos -l <login> -P <passwords list> -f <failed login message> <url>
 ```
 
+or
+
+```bash
+python3 -m dokos -l <login> -P <passwords list> -f <failed login message> <url>
+```
+
 The **failed login message** is required so dokos can recognize when a login attempt has failed, and hence to detect
 when login is sucessfull.