Chamged keyBase struct to cache calculation of 60 bit hash in keyBase.hash60. Duplicated all the code to manipulate and stringify the 30bit and 60bit hash values from hamt32 and hamt64.
Chamged keyBase struct to cache calculation of 60 bit hash in keyBase.hash60.
Duplicated all the code to manipulate and stringify the 30bit and 60bit
hash values from hamt32 and hamt64.

lleo/go-hamt,lleo/go-hamt