DNSscope v2.0.0 pre-release

THIS IS PRE-RELEASE! The data visualization and storage is way better, but currently there is no option for marking additional subdomains as "in-scope". You can add them manually for now since previous runs are now persistently stored.

Major overhaul - changed the entire structure to a SQLite3 database and Python/Flask web server. This means the data from each run is stored persistently and can be added to with subsequent runs now. It should also make the user input flow significantly less terrible.

Other minor updates:

• Added additional nameserver to list
• Updated sublist3r functionality to grab more subdomains without errors
  • fixed DNSdumpster and Virustotal modules (Virustotal key is added to the top of sublister.py)
  • Shout out to @coolzerohacks for the fix and of course @aboul3la for writing sublist3r
  • aboul3la/Sublist3r#394
  • https://github.com/coolzerohacks/coolzerohacks/blob/11965fa5b194a71f808814c2817c706954801e3b/Sublist3r.py)
• save whois data for each FLD