use Bits32 type
use protected for helpers
initial settings for hll
first full impl of hll; slow cardinality estimate
make class for dense hll impl
make add impl in HyperLogLogT abstract
HyperLogLog backed by sparse vector
update to scalaz 7.0.0-M8
remove print stmts
fix tagging of hll data structure; add test for hll
Merge branch 'feature/hll'