cover the units that are not module units

The template-header propagation only walked files with a module
declaration, so EU07.cpp, windows.cpp, export_e3d_standalone.cpp and
every betterRenderer source were outside it - including the file with
main(). They reach cParser and friends through eu07.simcore and
instantiate their templates without the headers those bodies name.

Adds audit_modules.py, which checks the whole tree for the seven classes
this migration hit; all seven are clean now.

scripting/PyIntStub.cpp

@@ -1,4 +1,17 @@
 #include "scripting/PyInt_macros.h"
+#include <array>
+#include <chrono>
+#include <cstddef>
+#include <deque>
+#include <limits>
+#include <mutex>
+#include <ostream>
+#include <sstream>
+#include <string>
+#include <type_traits>
+#include <unordered_map>
+#include <utility>
+#include <vector>
 import eu07.scripting.pyint;
 /*
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