add simplifier to java API

src/api/java/Simplifier.java

@@ -0,0 +1,58 @@
+/*++
+Copyright (c) 2012 Microsoft Corporation
+
+Module Name:
+
+    Simplifiers.cs
+
+Abstract:
+
+    Z3 Managed API: Simplifiers
+
+Author:
+
+    Christoph Wintersteiger (cwinter) 2012-03-21
+
+--*/
+
+package com.microsoft.z3;
+
+
+public class Simplifier extends Z3Object {
+    /*
+     * A string containing a description of parameters accepted by the simplifier.
+     */
+
+    public String getHelp()
+    {
+	return Native.simplifierGetHelp(getContext().nCtx(), getNativeObject());
+    }
+
+    /*
+     * Retrieves parameter descriptions for Simplifiers.
+     */
+    public ParamDescrs getParameterDescriptions() {
+	return new ParamDescrs(getContext(), Native.simplifierGetParamDescrs(getContext().nCtx(), getNativeObject())); 
+    }
+
+    Simplifier(Context ctx, long obj)
+    {
+	super(ctx, obj);
+    }
+
+    Simplifier(Context ctx, String name)
+    {
+	super(ctx, Native.mkSimplifier(ctx.nCtx(), name));
+    }
+
+    @Override
+    void incRef()
+    {
+	Native.simplifierIncRef(getContext().nCtx(), getNativeObject());
+    }
+
+    @Override
+    void addToReferenceQueue() {
+        getContext().getSimplifierDRQ().storeReference(getContext(), this);
+    }
+}