Initial support for for bunzip2....
This code could be improvemed by
 1) supporting more options,
 2) Creating a shared crc table with gunzip, or perhaps generated on the fly.
 3) Removing any remaining unneccessary code (e.g. if (noisy))
diff --git a/Config.h b/Config.h
index 95eb3de..36c897a 100644
--- a/Config.h
+++ b/Config.h
@@ -13,6 +13,7 @@
 //#define BB_AR
 //#define BB_ASH
 #define BB_BASENAME
+//#define BB_BUNZIP2
 #define BB_CAT
 #define BB_CHGRP
 #define BB_CHMOD