Add a KRACK module implementing client side vulnerabilities detection

Krack comes as an AP, able to detect:
 - CVE-2017-13077
 - CVE-2017-13080
 - All-zero TK
diff --git a/setup.py b/setup.py
index fd5c124..e1be3bc 100755
--- a/setup.py
+++ b/setup.py
@@ -58,6 +58,7 @@
         'scapy/layers/tls',
         'scapy/layers/tls/crypto',
         'scapy/modules',
+        'scapy/modules/krack',
         'scapy/asn1',
         'scapy/tools',
     ],