Added docker file for Kali linux
diff --git a/.travis.yml b/.travis.yml
index 6c1b51b..b97817d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,6 +7,7 @@
   #- DOCKERFILE=tests/dockerfiles/Ubuntu_15_04.docker IMGNAME=ubu15.04-grgsm
   #- DOCKERFILE=tests/dockerfiles/Debian_testing.docker IMGNAME=debtest-grgsm
   - DOCKERFILE=tests/dockerfiles/Ubuntu_16_04.docker IMGNAME=ubu16.04-grgsm
+  - DOCKERFILE=tests/dockerfiles/Kali.docker IMGNAME=kali-grgsm
 
 services:
   - docker