Update README.md (#76)

Coherence is a cryptographic server for modern web apps (a kind of alternative to HSM). It provides a TCP server with an json interface to perform cryptographic operations. 

Additional info:
*Offload, you have an specialized software dedicated entirely for cryptographic operations. Cryptographic operations like encrypting and decrypting is a very CPU-intensive task for webapps, so offload alleviates CPU-intensive encryption and decryption tasks from your webapp, boosting application performance.
*Interoperability, it doesn’t depend on a language programming, it depends on standards tcp and json, so you can integrate with homogeneous and heterogeneous systems.
* Flexibility, So it gives you all that you need to create your own cryptographic protocol.
*Open source, you can inspect, modify, and enhance.
* Free of charges, you don’t have to pay.

README.md

@@ -132,6 +132,7 @@ A curated list of cryptography resources and links.
 - [Bcrypt](http://bcrypt.sourceforge.net/) - Cross-platform file encryption utility.
 - [blackbox](https://github.com/StackExchange/blackbox) - safely store secrets in Git/Mercurial/Subversion.
 - [certbot](https://github.com/certbot/certbot) - Previously the Let's Encrypt Client, is EFF's tool to obtain certs from Let's Encrypt, and (optionally) auto-enable HTTPS on your server. It can also act as a client for any other CA that uses the ACME protocol.
+- [Coherence](https://github.com/liesware/coherence/) - Cryptographic server for modern web apps.
 - [cryptomator](https://github.com/cryptomator/cryptomator) - Multi-platform transparent client-side encryption of your files in the cloud.
 - [gpg](https://www.gnupg.org/) - Complete and free implementation of the OpenPGP standard. It allows to encrypt and sign your data and communication, features a versatile key management system. GnuPG is a command line tool with features for easy integration with other applications.
 - [ironssh](https://github.com/IronCoreLabs/ironssh) - End-to-end encrypt transferred files using sftp/scp and selectively share with others. Automatic key management works with any SSH server. Encrypted files are gpg compatible.