Add library maintenance scripts.

Maintenance/makefile

+#
+#             LUFA Library
+#     Copyright (C) Dean Camera, 2011.
+#
+#  dean [at] fourwalledcubicle [dot] com
+#           www.lufa-lib.org
+#
+
+# Maintenance scripts not required by general LUFA users, used for development.
+
+LUFA_ROOT = ../
+
+upgrade-doxygen:
+	@echo Updating Doxygen.conf files...
+	@for doxygen_conf in `find $(LUFA_ROOT) -name Doxygen.conf`; do \
+	  doxygen -u $$doxygen_conf; \
+	done;
+	@echo Doxygen configuration update complete.
+	
+check-release:
+	@echo Checking for release suitability...
+	@if ( grep "XXXXXX" $(LUFA_ROOT)/LUFA/DoxygenPages/*.txt > /dev/null ;); then \
+	  echo "  ERROR: Doxygen documentation has not been updated for release!"; \
+	fi;
+	@if ( grep "000000" $(LUFA_ROOT)/LUFA/Version.h > /dev/null ;); then \
+	  echo "  ERROR: Version header has not been updated for release!"; \
+	fi;
+	@echo Done.