Add LastPass Info

I added information for LastPass, a cloud-based password manager. Since there's no security section, I figured it fits under SaaS. There are a few alternate security methods, such as a fingerprint/card reader and a type of printable grid. 

Full info here: https://helpdesk.lastpass.com/security-options/multifactor-authentication-options/

PS please pardon me if I'm breaking any Github netiquette. I'm somewhat new here :3