Compatibility section with version breakdown

With a buffered proxy, we heavily rely on Ember (public) internals. It's important to show what's the minimal version of Ember that is needed for this addon to work properly.

Author: tniezurawski

README.md

@@ -101,9 +101,11 @@ let buffer = ObjectProxy.extend(BufferedMixin).create({
 Compatibility
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-* Ember.js v3.8 or above
-* Ember CLI v3.8 or above
-* Node.js v8 or above
+| Version | Minimal Ember version required |
+| --- | --- |
+| > 1.0.1 | 3.8 |
+| 0.8.0 - 1.0.1 | 2.15 |
+| < 0.8 | 2.5 |
 
 Contributing
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