Added changelog to the README

Author: hrajchert

README.md

@@ -109,6 +109,18 @@ This SDK uses [Composer](http://getcomposer.org/doc/01-basic-usage.md) to manage
 
 #### Enjoy
 
+# CHANGELOG
+
+## 0.6.6
+
+- Internal change, instead of using inheritance to change how we persist user data we now use composition
+- API change, now getUserInfo returns the user info directly, so if you want the user name you use $userInfo['name'] instead of $userInfo['results']['name']
+
+## 0.6.5
+
+- Added fitbit example
+- Fix base url bug
+
 # TODO
 
 - Better code documentation