Pull Request

Hi, I found that Python-Omegle-API is interesting, and I just made some changes to it. 

1. I move all of the event_handlers into omegle.py so that man-in-the-middle-attack.py no longer has to define get_handle_xxx, which makes the code easier to read.

2. I add python module "logging" in order to save the messages into a file.

3. "argparse" is also added so that we can input the topic you wanna talk in Python-Omegle-API.