Improve options, #define default version.

Add -h option for help
Add -q quiet option to reduce or suppress the whining
Create #define for the default version value.

Signed-off-by: vanbaren@cideas.com <vanbaren@cideas.com>
diff --git a/dtc.h b/dtc.h
index 8d3964c..e3e2863 100644
--- a/dtc.h
+++ b/dtc.h
@@ -36,6 +36,11 @@
 
 #include "flat_dt.h"
 
+/*
+ * Level of quietness
+ */
+int quiet;
+
 static inline void die(char * str, ...)
 {
 	va_list ap;