MINOR Added changelog for 0.3

CHANGELOG

@@ -1,3 +1,19 @@
+0.3:
+	API CHANGE Changed MultiFormStep::$next_steps to public, and MultiFormStep::$is_final_step to public
+	API CHANGE MultiForm::$start_step is now declared as public, not protected, due to changes in Object::get_static()
+	ENHANCEMENT Custom text for back/next and submit buttons on a per-step basis
+	BUGFIX Checking $this->Data exists before trying to unserialize it
+	BUGFIX #4480 MultiForm::next() and MultiForm::prev() now save the form data before checking the next or previous step
+	API CHANGE Added currentSessionHash property to MultiForm which stores the currently opened session by the user
+	API CHANGE Renamed MultiForm::getSessionRecord() to getCurrentSession() and removed the parameter, since this wasn't done in a very OOP manner
+	ENHANCEMENT: enabled MultiForm to use customised action (actions_exempt_from_validation).
+		Changed has been done in the constructor to read the static variables (incl. overwritten variables).
+	BUGFIX: MultiFormStep::saveInto() needs the current Controller as the new $form Controller to work
+	ENHANCEMENT Added language files
+	BUGFIX If the step doesn't exist, don't attempt to delete it
+	BUGFIX Ensure that any relations to MultiFormStep are destroyed before calling delete()
+	ENHANCEMENT Removed hack of specific action to bypass validation and allow specifying actions to be exempt through a public static variable
+
 0.2:
  - ENHANCEMENT Updated entities and added german translation for multiform
  - ENHANCEMENT Making multiform module translatable