add kitchen ci and travis support [WIP] (#1)

* add kitchen ci, travis ci

* fine tune sudo & gem deps

* Update client_single.sls

* Update README.rst
diff --git a/tests/pillar/client_single.sls b/tests/pillar/client_single.sls
index b049fc4..b4a0035 100644
--- a/tests/pillar/client_single.sls
+++ b/tests/pillar/client_single.sls
@@ -1,6 +1,16 @@
 git:
   client:
     enabled: true
+    user:
+    - user:
+        name: jdoe
+        email: j@doe.com
 linux:
   system:
     enabled: true
+    user:
+      jdoe:
+        enabled: true
+        sudo: true
+        full_name: John Doe
+        home: /home/jdoe