Changed filenames to have no underscores. Updated makefile to wrtie a warning if there are underscores in filenames which are used during the build process. Closes #36

Makefile

@@ -47,6 +47,18 @@ build-stage:
 	@echo "Merging style files into the staging directory"
 	@rsync -av $(STYLEDIR)/ $(STAGINGDIR)/style --quiet
 
+    # Prüfen auf Dateien mit Unterstrichen im Namen
+	@echo "Checking for files containing underscores in $(STAGINGDIR)..."
+	@files=$$(find $(STAGINGDIR) -type f -name '*_*'); \
+	if [ -n "$$files" ]; then \
+		echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"; \
+		echo "WARNING: Found files with underscores:"; \
+		echo " ->  $$files"; \
+		echo "These files are very likely to cause issues during the build process"; \
+		echo "Remove or rename them to build the thesis safely"; \
+		echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"; \
+	fi
+
 compile-output:
     # Bauen der Arbeit aus dem staging verzeichnis heraus
 	@echo "Compiling the thesis into: $(OUTPUTFILE)"