Updated the gitsubmodule to use the public git URL, and told Travis that sudo isn't needed.

bramp · bramp · commit 692737d6f37a · 2015-11-01T12:24:09.000-08:00
diff --git a/.gitmodules b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "_site"]
 	path = _site
-	url = git@github.com:bramp/js-sequence-diagrams.git
+	url = https://github.com/bramp/js-sequence-diagrams.git
diff --git a/.travis.yml b/.travis.yml
@@ -1,3 +1,4 @@
 language: node_js
+sudo: false
 node_js:
   - "0.12"
