Add link for the releases page in README

Author: davidpiegza

README.markdown

@@ -24,7 +24,7 @@ The project consists of
 
 ### Graph Structure ###
 
-This is implemented in graph-visualization/Graph.js. 
+This is implemented in graph-visualization/Graph.js.
 
 Usage:
 
@@ -40,8 +40,8 @@ Node:
 A node has the properties
 
   - `ID`
-  - `nodesTo`, Array with connected nodes 
-  - `nodesFrom`, Array with connected nodes 
+  - `nodesTo`, Array with connected nodes
+  - `nodesFrom`, Array with connected nodes
   - `position`, Object for x, y, z position, default is {}
   - `data`, Object with further properties, e.g. properties for a graph layout
 
@@ -56,7 +56,7 @@ A graph layout has the basic structure:
       this.init = function() {
         ...
       };
-      
+
       this.generate = function() {
         ...
       };
@@ -68,4 +68,10 @@ The graph layout gets the created graph and calculates new positions for the nod
 
 The graph layout may extend the nodes and edges with custom properties in the data object.
 
-See [force-based-layout.js](https://github.com/davidpiegza/Graph-Visualization/blob/master/layouts/force-based-layout.js) for example usage.
+See [force-based-layout.js](https://github.com/davidpiegza/Graph-Visualization/blob/master/layouts/force-based-layout.js) for example usage.
+
+
+Changelog
+-------------------
+
+See [releases](https://github.com/davidpiegza/Graph-Visualization/releases).