update the History.md file

History.md

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+# Ki 0.4.0 March 6, 2011
+
+* Updated the statechart and state class to now include logic that checks if they can respond to
+  and event
+* tryToPerform has been added to the statechart mixin
+* The state's tryToHandleEvent method now checks if an event handler returned the value NO
+* statechart's sendEvent arguments have been made to be more generic. Now arg1 and arg2
+* Updated framework's tracing functionality to improve debugging statecharts
+* removed the try-catch block in statechart's sendEvent method. Was an old hold-over that is no
+  longer useful
+* Updated framework to simplify the construction of a statechart
+* refactored logging logic for tracing, errors and warning messages
+* added invokeStateMethod to the Ki.StatechartManager mixin
+* Added firstCurrentState computed property to Ki.StatechartManager mixin
+* Updated the gotoState error message when attempting to transition from one state to another state
+  where the pivot state's substates are concurrent
+* Added destory logic to both Ki.StatechartManager and Ki.State
+* Improved the trace and owner feature so that the properties representing them are no longer 
+  fixed. Can now use special key properties to change what owner and trace properties to use
+* Added feature to statechart to suppress warning messages produced by the statechart
+* Enhanced Ki.State.plugin feature so that it can optionally be provided hash objects that
+  get added to a plugged-in state upon creation.
+
+# Ki 0.3.0 January 9, 2011
+
+* Refactored Ki.StatechartManager mixin logic. initMixin is now part of the initStatechart method
+* Added Ki.HistoryState that can be set as the initial substate
+* Updated Ki.State toString method. Now provides a better string representation for debugging
+* Added fullPath computed property to Ki.State
+* Updated Ki.StatechartMonitor's toString method
+* Updated statechart logic so that you can now supply an optional context value to both gotoState
+  and gotoHistoryState that will be supplied to all states that are exited and entered during
+  a state transition process
+* Updated statechart logic so that if a state's initialSubstate is *not* a value then the default
+  state used will be an empty state (Ki.EmptyState). A root state must *always* have its
+  initialSubstate property assigned an explicit value.
+
 # Ki 0.2.0 October 6, 2010
 
 * Added advanced event handling functionality to framework