Added a large default password list for services.

This is a default password list that covers common services and networked devices. It is created by crawling multiple possible common password lists and ordering by occurance of each password. The list was created with the help of the unhash project: 
https://github.com/tkisason/unhash

I think this would be useful for metasploit because the list covers a lot of common scenarios and contains only 1787 user/password pairs.