Add Chartboost to 'In the Wild'

Author: yarunluon

Diff for: README.md

@@ -2679,6 +2679,7 @@ Other Style Guides
   - **Bisk**: [bisk/javascript](https://github.com/Bisk/javascript/)
   - **Blendle**: [blendle/javascript](https://github.com/blendle/javascript)
   - **Brainshark**: [brainshark/javascript](https://github.com/brainshark/javascript)
+  - **Chartboost**: [ChartBoost/javascript-style-guide](https://github.com/ChartBoost/javascript-style-guide)
   - **ComparaOnline**: [comparaonline/javascript](https://github.com/comparaonline/javascript-style-guide)
   - **Compass Learning**: [compasslearning/javascript-style-guide](https://github.com/compasslearning/javascript-style-guide)
   - **DailyMotion**: [dailymotion/javascript](https://github.com/dailymotion/javascript)