code: func (b *Bitset) Slice(startingBit, size int) Bitset {
  	ret := Bitset{}
  	ret.Create(size)
  	ret.bits = b.bits[startingBit : startingBit+size]
  	return ret
  }
docs: // Slice returns an out of memory slice of the current bitset
  // between bits 'startingBit' and 'startingBit + size'