Update Doxygen documentation build scripts to fail if any warnings are generated.

Bootloaders/CDC/makefile

@@ -694,7 +694,9 @@ clean_list :
 
 doxygen:
 	@echo Generating Project Documentation \($(TARGET)\)...
-	@doxygen Doxygen.conf
+	@if ( doxygen Doxygen.conf 2>&1 | grep "warning" ;); then \
+	  exit 1; \
+	fi;
 	@echo Documentation Generation Complete.
 
 clean_doxygen:

Bootloaders/DFU/makefile

@@ -689,7 +689,9 @@ clean_list :
 
 doxygen:
 	@echo Generating Project Documentation \($(TARGET)\)...
-	@doxygen Doxygen.conf
+	@if ( doxygen Doxygen.conf 2>&1 | grep "warning" ;); then \
+	  exit 1; \
+	fi;
 	@echo Documentation Generation Complete.
 
 clean_doxygen:

Bootloaders/HID/makefile

@@ -686,7 +686,9 @@ clean_list :
 
 doxygen:
 	@echo Generating Project Documentation \($(TARGET)\)...
-	@doxygen Doxygen.conf
+	@if ( doxygen Doxygen.conf 2>&1 | grep "warning" ;); then \
+	  exit 1; \
+	fi;
 	@echo Documentation Generation Complete.
 
 clean_doxygen:

BuildTests/ModuleTest/makefile.avr8

@@ -707,9 +707,12 @@ clean_list :
 
 doxygen:
 	@echo Generating Project Documentation \($(TARGET)\)...
-	@doxygen Doxygen.conf
+	@if ( doxygen Doxygen.conf 2>&1 | grep "warning" ;); then \
+	  exit 1; \
+	fi;
 	@echo Documentation Generation Complete.
 
+
 clean_doxygen:
 	rm -rf Documentation
 

BuildTests/ModuleTest/makefile.uc3

@@ -481,7 +481,9 @@ clean_list :
 
 doxygen:
 	@echo Generating Project Documentation \($(TARGET)\)...
-	@doxygen Doxygen.conf
+	@if ( doxygen Doxygen.conf 2>&1 | grep "warning" ;); then \
+	  exit 1; \
+	fi;
 	@echo Documentation Generation Complete.
 
 clean_doxygen:

BuildTests/ModuleTest/makefile.xmega

@@ -701,7 +701,9 @@ clean_list :
 
 doxygen:
 	@echo Generating Project Documentation \($(TARGET)\)...
-	@doxygen Doxygen.conf
+	@if ( doxygen Doxygen.conf 2>&1 | grep "warning" ;); then \
+	  exit 1; \
+	fi;
 	@echo Documentation Generation Complete.
 
 clean_doxygen:

BuildTests/SingleUSBModeTest/makefile.avr8

@@ -691,7 +691,9 @@ clean_list :
 
 doxygen:
 	@echo Generating Project Documentation \($(TARGET)\)...
-	@doxygen Doxygen.conf
+	@if ( doxygen Doxygen.conf 2>&1 | grep "warning" ;); then \
+	  exit 1; \
+	fi;
 	@echo Documentation Generation Complete.
 
 clean_doxygen:

BuildTests/SingleUSBModeTest/makefile.uc3

@@ -454,7 +454,9 @@ clean_list :
 
 doxygen:
 	@echo Generating Project Documentation \($(TARGET)\)...
-	@doxygen Doxygen.conf
+	@if ( doxygen Doxygen.conf 2>&1 | grep "warning" ;); then \
+	  exit 1; \
+	fi;
 	@echo Documentation Generation Complete.
 
 clean_doxygen:

BuildTests/SingleUSBModeTest/makefile.xmega

@@ -673,7 +673,9 @@ clean_list :
 
 doxygen:
 	@echo Generating Project Documentation \($(TARGET)\)...
-	@doxygen Doxygen.conf
+	@if ( doxygen Doxygen.conf 2>&1 | grep "warning" ;); then \
+	  exit 1; \
+	fi;
 	@echo Documentation Generation Complete.
 
 clean_doxygen:

BuildTests/StaticAnalysisTest/makefile

@@ -42,4 +42,5 @@ staticcheck:
 	cppcheck --quiet --inline-suppr --check-config --template=$(MESSAGE_TEMPLATE) $(INCLUDE_PATHS:%=-I%) $(EXCLUDE_LIST:%=-i%) $(LUFA_ROOT_PATH)
 	cppcheck --quiet --inline-suppr --error-exitcode=1 --std=c99 --force --enable=all --inconclusive $(SUPPRESS_WARNINGS:%=--suppress=%) --template=$(MESSAGE_TEMPLATE) $(INCLUDE_PATHS:%=-I%) $(EXCLUDE_LIST:%=-i%) $(LUFA_ROOT_PATH)
 
-%:
\ No newline at end of file
+%:
+	
\ No newline at end of file

Demos/Device/ClassDriver/AudioInput/makefile

@@ -698,7 +698,9 @@ clean_list :
 
 doxygen:
 	@echo Generating Project Documentation \($(TARGET)\)...
-	@doxygen Doxygen.conf
+	@if ( doxygen Doxygen.conf 2>&1 | grep "warning" ;); then \
+	  exit 1; \
+	fi;
 	@echo Documentation Generation Complete.
 
 clean_doxygen:

Demos/Device/ClassDriver/AudioOutput/makefile

@@ -699,7 +699,9 @@ clean_list :
 
 doxygen:
 	@echo Generating Project Documentation \($(TARGET)\)...
-	@doxygen Doxygen.conf
+	@if ( doxygen Doxygen.conf 2>&1 | grep "warning" ;); then \
+	  exit 1; \
+	fi;
 	@echo Documentation Generation Complete.
 
 clean_doxygen:

Demos/Device/ClassDriver/DualVirtualSerial/makefile

@@ -695,7 +695,9 @@ clean_list :
 
 doxygen:
 	@echo Generating Project Documentation \($(TARGET)\)...
-	@doxygen Doxygen.conf
+	@if ( doxygen Doxygen.conf 2>&1 | grep "warning" ;); then \
+	  exit 1; \
+	fi;
 	@echo Documentation Generation Complete.
 
 clean_doxygen:

Demos/Device/ClassDriver/GenericHID/makefile

@@ -695,7 +695,9 @@ clean_list :
 
 doxygen:
 	@echo Generating Project Documentation \($(TARGET)\)...
-	@doxygen Doxygen.conf
+	@if ( doxygen Doxygen.conf 2>&1 | grep "warning" ;); then \
+	  exit 1; \
+	fi;
 	@echo Documentation Generation Complete.
 
 clean_doxygen:

Demos/Device/ClassDriver/Joystick/makefile

@@ -695,7 +695,9 @@ clean_list :
 
 doxygen:
 	@echo Generating Project Documentation \($(TARGET)\)...
-	@doxygen Doxygen.conf
+	@if ( doxygen Doxygen.conf 2>&1 | grep "warning" ;); then \
+	  exit 1; \
+	fi;
 	@echo Documentation Generation Complete.
 
 clean_doxygen:

Demos/Device/ClassDriver/Keyboard/makefile

@@ -695,7 +695,9 @@ clean_list :
 
 doxygen:
 	@echo Generating Project Documentation \($(TARGET)\)...
-	@doxygen Doxygen.conf
+	@if ( doxygen Doxygen.conf 2>&1 | grep "warning" ;); then \
+	  exit 1; \
+	fi;
 	@echo Documentation Generation Complete.
 
 clean_doxygen:

Demos/Device/ClassDriver/KeyboardMouse/makefile

@@ -695,7 +695,9 @@ clean_list :
 
 doxygen:
 	@echo Generating Project Documentation \($(TARGET)\)...
-	@doxygen Doxygen.conf
+	@if ( doxygen Doxygen.conf 2>&1 | grep "warning" ;); then \
+	  exit 1; \
+	fi;
 	@echo Documentation Generation Complete.
 
 clean_doxygen:

Demos/Device/ClassDriver/KeyboardMouseMultiReport/makefile

@@ -695,7 +695,9 @@ clean_list :
 
 doxygen:
 	@echo Generating Project Documentation \($(TARGET)\)...
-	@doxygen Doxygen.conf
+	@if ( doxygen Doxygen.conf 2>&1 | grep "warning" ;); then \
+	  exit 1; \
+	fi;
 	@echo Documentation Generation Complete.
 
 clean_doxygen:

Demos/Device/ClassDriver/MIDI/makefile

@@ -695,7 +695,9 @@ clean_list :
 
 doxygen:
 	@echo Generating Project Documentation \($(TARGET)\)...
-	@doxygen Doxygen.conf
+	@if ( doxygen Doxygen.conf 2>&1 | grep "warning" ;); then \
+	  exit 1; \
+	fi;
 	@echo Documentation Generation Complete.
 
 clean_doxygen:

Demos/Device/ClassDriver/MassStorage/makefile

@@ -698,7 +698,9 @@ clean_list :
 
 doxygen:
 	@echo Generating Project Documentation \($(TARGET)\)...
-	@doxygen Doxygen.conf
+	@if ( doxygen Doxygen.conf 2>&1 | grep "warning" ;); then \
+	  exit 1; \
+	fi;
 	@echo Documentation Generation Complete.
 
 clean_doxygen: