added link to important changes

Signed-off-by: Kai Kreuzer <kai@openhab.org> (github: @kaikreuzer)

README.md

@@ -13,7 +13,9 @@ This project here is the home of the next-generation openHAB aka openHAB 2.
 A major focus of openHAB 2 is adding administration UIs to the system to make it more user-friendly for "regular" users (i.e. not the developer type). For this, openHAB 2 is now based on the [Eclipse SmartHome](http://www.eclipse.org/smarthome) project. You can find information about the relation of these projects in [this blogpost](http://kaikreuzer.blogspot.de/2014/06/openhab-20-and-eclipse-smarthome.html).
 There is a configuration UI prototype already available, called [Paper UI](https://www.youtube.com/watch?v=NolVoL8ewO0&feature=youtu.be).
 
-openHAB 2 is currently under heavy development and so far there is only an [alpha release available](https://github.com/openhab/openhab2/releases/tag/2.0.0-alpha1). Additionally, we have snapshot builds [available at CloudBees](https://openhab.ci.cloudbees.com/job/openHAB2/). openHAB 2.0 includes a [1.x compatibility layer](docs/sources/installation/compatibilitylayer.md), which allows using 1.x add-ons with the new runtime.
+openHAB 2 is currently under development and so far there is only an [alpha release available](https://github.com/openhab/openhab2/releases/tag/2.0.0-alpha1). Additionally, we have snapshot builds [available at CloudBees](https://openhab.ci.cloudbees.com/job/openHAB2/). openHAB 2.0 includes a [1.x compatibility layer](docs/sources/installation/compatibilitylayer.md), which allows using 1.x add-ons with the new runtime.
+
+*Please read about [important changes and known limitations](docs/sources/installation/intro.md) before trying out the binary builds yourself.*
 
 If you want to learn more about openHAB 2.0, please also check out [this blog post](http://kaikreuzer.blogspot.de/2014/11/openhab-16-and-20-alpha-release.html).