Make RIPEMD-160 actually accept proper ++byts
Make RIPEMD-160 actually accept proper ++byts

Previously, it was interpreting the wid as bit-length rather than
byte-length, which is inconsistent, confusing, and largely unnecessary.

belisarius222/arvo,ngzax/urbit,jfranklin9000/urbit,jfranklin9000/urbit,ngzax/urbit,urbit/urbit,urbit/urbit,joemfb/arvo,jfranklin9000/urbit,belisarius222/arvo,urbit/urbit,ngzax/urbit,urbit/urbit,jfranklin9000/urbit,ngzax/urbit,joemfb/arvo,urbit/urbit,urbit/urbit,ngzax/urbit,jfranklin9000/urbit,ngzax/urbit,urbit/urbit,jfranklin9000/urbit,jfranklin9000/urbit,ngzax/urbit