Enable sp build web in styling

.travis.yml

@@ -5,3 +5,7 @@ before_script:
   - npm install -g gulp
 script:
   - npm run build
+cache:
+  directories:
+    - node_modules
+    - common/node_modules

common/changes/enable-sp-build-web-in-styling_2017-05-02-20-15.json

@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@uifabric/styling",
+      "comment": "Change the build rig in @uifabric/styling to one that enables the creation of a bundle safe for consumption by SharePoint partners. This should have no effect on the output of the modules.",
+      "type": "minor"
+    }
+  ],
+  "email": "srdeshpa@microsoft.com"
+}