Improve error checking. Add partial support for verbose output

src/args.h

@@ -1,11 +1,13 @@
 #ifndef __ARGS__
 #define __ARGS__
 
+#include <stdbool.h>
 #include "printer.h"
 
 int parseArgs(int argc, char* argv[]);
 STYLE getStyle();
 int showHelp();
 int showVersion();
+bool verbose_enabled();
 
 #endif