Real handshake with activecell

[alekseykulikov]

Uncomment https://github.com/activecell/porchetta/blob/master/lib/index.js#L7

it seems, cookie authentication does not work through domains. I have another example, inspired by intercom:

1. On the client:

hash  = $('meta [name="user_hash"]').attr("content")
email = app.user.get('email')
query = "email=#{email}&hash_email=#{hash}"
new Porchetta(http://localhost:4000, app.company.id, { query: query })

1. Porchetta server pass data.query to POST /api/v1/handshake.json
2. On server:

• generate meta tag user_hash with SHA256 for app page with secret key
• on handshake_controller validate email & hash_email with secret key