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/metadata.yml b/metadata.yml
index 1d17a61..7b9cc1e 100644
--- a/metadata.yml
+++ b/metadata.yml
@@ -1,6 +1,6 @@
 name: "git"
 version: "0.2"
-source: "https://github.com/tcpcloud/salt-formula-git"
+source: "https://github.com/salt-formulas/salt-formula-git"
 dependencies:
 - name: linux
-  source: "https://github.com/tcpcloud/salt-formula-linux"
\ No newline at end of file
+  source: "https://github.com/salt-formulas/salt-formula-linux"