If a visitor has accepted cookies on www.storj.io, there might be a
"hubspotutk" cookie in their browser upon account creation. This allows
Hubspot to link website activity with a newly created user.
Change-Id: If06c67fb4d2e5dd3cf46c1fe80a0e9d7f25d6e58
This allows us to distinguish between accounts created from the signup
page vs. from www.storj.io.
Also set a field `account_created=true` when we send so
that we can see when existing leads have created an account.
Change-Id: Ibef34825a08b6c68b8f2869625e576bb837520e5
