precompiled headers. need to change workspace settings for them to take effect

This was SVN commit r222.

source/lib/precompiled.cpp

@@ -0,0 +1 @@
+#include "precompiled.h"

source/lib/precompiled.h

@@ -0,0 +1,24 @@
+#include <string.h>
+#include <stdlib.h>
+
+#include <stdio.h>
+
+#include <math.h>
+#include <assert.h>
+#include <stdarg.h>
+#include <limits.h>
+#include <time.h>
+
+#include <wchar.h>
+
+
+#include <list>
+#include <map>
+#include <vector>
+#include <stack>
+#include <string>
+
+#include <functional>
+#include <algorithm>
+
+#include <numeric>