Added script to download the crawl

[innovationchef]

This PR is in reference to #1
@justinccdev , as you suggested, I added a separate script for dumping and I am attaching a sample output of the dump. Please let me know if it has got issues.
crawl.txt

[justinccdev]

Hi @innovationchef

• urls_to_exclude() is unused
• there are unused imports
• I'd like to see filepath as an input parameter, though a default would be fine. If so, it should cut off the extension with generic code, e.g. with os.path.splitext(), not assume a suffix of '.db'
• The params in the documentation of save_crawl_data() do not match the actual parameter names. I'm not sure you need a separate function of this yet, it's a pretty simple piece of code.
• Opening the file handle for every single write is not desirable. It needs to be opened just once.
• Do you use an IDE? If so, I can recommend the free pycharm as this is good at picking up on some of these issues.

[innovationchef]

Hey @justinccdev ,
I incorporated the changes. Please have a look.
Yes, I have been using Sublime till now. I shifted to pycharm and it is really helpful while working on a large code base .
Thanks for the suggestions :)

[justinccdev]

Thanks @innovationchef