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.

betterRenderer/renderer/source/sky.cpp

@@ -9,6 +9,17 @@
 #include "nvrendererbackend.h"
 #include "imgui/imgui.h"
 
+#include <chrono>
+#include <cstddef>
+#include <deque>
+#include <mutex>
+#include <ostream>
+#include <sstream>
+#include <string>
+#include <type_traits>
+#include <unordered_map>
+#include <utility>
+#include <vector>
 import eu07.simulation.simulationenvironment;
 import eu07.simulation.simulationtime;
 import eu07.glm;