Update .travis.yml

Added gist to address submodule permissions

Author: cp2boston

.travis.yml

@@ -4,7 +4,13 @@ node_js:
   - "0.12.7"
   - "1.0.4"
   - "4.2.2"
+# Handle git submodules yourself
+git:
+    submodules: false
+# Use sed to replace the SSH URL with the public URL, then initialize submodules
 before_install:
+  - sed -i 's/[email protected]:/https:\/\/github.com\//' .gitmodules
+  - git submodule update --init --recursive  
   - npm install -g npm
 before_script:
   - npm install grunt-cli -g