Moved auth.c to separate dir

examples/digest_authentication/Makefile

@@ -0,0 +1,12 @@
+# Copyright (c) 2014 Cesanta Software
+# All rights reserved
+
+PROG = digest_auth
+CFLAGS = -W -Wall -I../.. -g -O0 $(CFLAGS_EXTRA)
+SOURCES = $(PROG).c ../../mongoose.c
+
+$(PROG): $(SOURCES)
+	$(CC) -o $(PROG) $(SOURCES) $(CFLAGS)
+
+clean:
+	rm -rf $(PROG) *.exe *.dSYM *.obj *.exp .*o *.lib