Add new project called ViaCRYPT

This is a service to send encrypted messages. It generates a link that you send to someone who will read the message. 
You can check it here: https://viacry.pt/
The source code can be checked here: https://github.com/vialink/viacrypt

In the site there is a better explanation of the inner working.

I think this is a service that suits well the requirements of Prism-Break project.
As I didn't find a good subcategory to put it, I created a new one called 'Encrypted Messaging'.

Please let me know what you think of this.

Thank you