rewrote initialization to save space. fixed bug in seeding. top 11 bits were not changed by different seeds.
rewrote initialization to save space.
fixed bug in seeding. top 11 bits were
not changed by different seeds.

R=r
OCL=28998
CL=28998
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go