Added CharacterString Value object example and unit tests, and added to demo/server example application.

Added Multi-state Value object example and unit tests, and added to demo/server example application.
Fixed Analog Input object, Analog Output object, Analog Value object, Device object, Multi-state Input object, Multi-state Output object examples to return correct error codes for WriteProperty service (per BACnet 135.1-2009-9.22.2.6).
Fixed top level ReadProperty and WriteProperty handlers in Device object to return correct error codes (per BACnet 135.1-2009-9.22.2.5)

bacnet-stack/demo/object/msv.mak

@@ -0,0 +1,40 @@
+#Makefile to build test case
+CC      = gcc
+SRC_DIR = ../../src
+TEST_DIR = ../../test
+INCLUDES = -I../../include -I$(TEST_DIR) -I.
+DEFINES = -DBIG_ENDIAN=0 -DTEST -DBACAPP_ALL -DTEST_MULTISTATE_VALUE
+
+CFLAGS  = -Wall $(INCLUDES) $(DEFINES) -g
+
+SRCS = msv.c \
+	$(SRC_DIR)/bacdcode.c \
+	$(SRC_DIR)/bacint.c \
+	$(SRC_DIR)/bacstr.c \
+	$(SRC_DIR)/bacreal.c \
+	$(SRC_DIR)/datetime.c \
+	$(SRC_DIR)/bacapp.c \
+	$(SRC_DIR)/bactext.c \
+	$(SRC_DIR)/indtext.c \
+	$(TEST_DIR)/ctest.c
+
+TARGET = multistate_value
+
+all: ${TARGET}
+
+OBJS = ${SRCS:.c=.o}
+
+${TARGET}: ${OBJS}
+	${CC} -o $@ ${OBJS}
+
+.c.o:
+	${CC} -c ${CFLAGS} $*.c -o $@
+
+depend:
+	rm -f .depend
+	${CC} -MM ${CFLAGS} *.c >> .depend
+
+clean:
+	rm -rf core ${TARGET} $(OBJS)
+
+include: .depend