adding missing files...

src/changes.cpp

+#include <map>
+#include <string>
+
+namespace Versions {
+    std::map<unsigned int, std::string> changes;
+
+    void fillChanges() {
+        if (changes.size() > 0) return;
+
+        changes.insert({105,
+                    "* The normalization of the 2-dimensional field maps has changed.\n"
+                    "  Instead of normalizing with the overall maximum value of longitudinal\n"
+                    "  component Opal now uses the maximum value on axis.\n"
+                    "\n"
+                    " The parser has been modified to check the type of all variables. All real \n"
+                    " variables have to be prefixed with the keyword REAL.\n"
+                    });
+    }
+}
\ No newline at end of file

src/changes.h

+#ifndef CHANGES_H
+#define CHANGES_H
+
+#include <map>
+#include <string>
+namespace Versions {
+    extern std::map<unsigned int, std::string> changes;
+
+    void fillChanges();
+}
+
+#endif
\ No newline at end of file