Merge branch 'plugins' of https://github.com/Countly/countly-server i…

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README.md

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 **We're hiring:** Countly is looking for full stack node.js developers to work on its core platform. [Click this link for job description](https://count.ly/full-stack-node-js-developer/)
 
+**Note:** [A bug with installer](https://github.com/Countly/countly-server/issues/143) prevents Countly running under Ubuntu 15.04. Please use Ubuntu 13 or 14 series for now.
+
 ##What's Countly?
-[Countly](http://count.ly) is an innovative, real-time, open source mobile analytics and push notifications platform. It collects data from mobile phones, tablets and other internet-connected devices, and visualizes this information to analyze mobile application usage and end-user behavior. There are two parts of Countly: the server that collects and analyzes data, and mobile SDK that sends this data.
+[Countly](http://count.ly) is an innovative, real-time, open source mobile analytics and push notifications platform. It collects data from mobile phones, tablets, [Apple Watch](http://blog.count.ly/post/119031457543/countly-on-apple-watch) and other internet-connected devices, and visualizes this information to analyze mobile application usage and end-user behavior. There are two parts of Countly: the server that collects and analyzes data, and mobile SDK that sends this data.
 
 This repository includes Countly Community Edition. For more information other versions (e.g Enterprise Edition), see [comparison of different Countly editions](https://count.ly/compare)