made hex2bin() bin2hex() bin2dec() dec2bin() public methods (previously private)
made hex2bin() bin2hex() bin2dec() dec2bin() public methods (previously private)

git-svn-id: 194159a778115b6f178b8ada10909407840e49ec@1373 b63d296a-7662-4df4-3098-00f9c2c9103a

tavlima/fosstrak-tdt