Merge pull request airbnb#219 from studentsphere/master

Update README.md, Add StudentSphere in the list

Author: hshoff

README.md

@@ -1524,6 +1524,7 @@
   - **Ripple**: [ripple/javascript-style-guide](https://github.com/ripple/javascript-style-guide)
   - **SeekingAlpha**: [seekingalpha/javascript-style-guide](https://github.com/seekingalpha/javascript-style-guide)
   - **Shutterfly**: [shutterfly/javascript](https://github.com/shutterfly/javascript)
+  - **StudentSphere**: [studentsphere/javascript](https://github.com/studentsphere/javascript)
   - **Target**: [target/javascript](https://github.com/target/javascript)
   - **TheLadders**: [TheLadders/javascript](https://github.com/TheLadders/javascript)
   - **Userify**: [userify/javascript](https://github.com/userify/javascript)