Update 'README.md'

README.md

@@ -1,5 +1,7 @@
 # PQ Crypto Catalog
 
+[![Build Status](https://drone.amongbytes.com/api/badges/kris/pqc/status.svg)](https://drone.amongbytes.com/kris/pqc)
+
 This is a repository of post-quantum schemes copied from either the submission to the NIST Post-Quantum Standardization or [PQClean](https://github.com/PQClean/PQClean) project. The goal of the library is to provide easy to use API which enables quick experimentation with some post-quantum cryptographic schemes.
 
 Users shouldn't expect any level of security provided by this code. The library is not meant to be used on live production systems.