Adding Phishtank support #46

[evilcel3ri]

This works add a first support for Phishtank. A user can query the API without or without a key with the command:

harpoon phishtank url URL

Result will look like this for a negative result

❯ harpoon phishtank url http://dnznice.com/1865835xf3542366mq410647075iz12634OR2GCr103247LD
# Phishtank result for: http://dnznice.com/1865835xf3542366mq410647075iz12634OR2GCr103247LD
------------------------------
Present in database: False

Or for a positive result

❯ harpoon phishtank url http://google.com
# Phishtank result for: http://google.com
------------------------------
Present in database: True
URL to submission: http://www.phishtank.com/phish_detail.php?phish_id=11807
Verified: True

[evilcel3ri]

I need to test it a bit, hold the merge a couple of days