Add google import fields

Added support for notes, websites, employer, occupation and picture to the Google import. It only imports a picture if the contact is not connected to a Facebook account, which would provide its picture.

I added a google_account_id field in the google_contacts table to track which Google account the contact came from for future sync purposes.
use " ... " instead of \'
`it "doesn't import a picture if the person has an associated facebook account" do`