Diego81/omnicontacts — pull request #60 by dalibor (2013-08-20 19:52:35+00:00)
Title: Extract email_hashes array for Hotmail

Hotmail does not give email addresses for a contact, but just email hashes.

We can check if email hashes match by calculating the hash for an email with the following algorithm:

```ruby
Digest::SHA256.hexdigest((email + client_id).downcase).downcase
```