Biterator

Just needed to write some bit encoding code and needed a bit stream from a byte array. Looked around a bit, couldn't find something quick so wrote it.

	class Biterator(ba: Array[Byte]) extends Iterator[Int]{
	var bitIndex = 0
	var byteIndex = 0
	override def hasNext() =
	byteIndex < ba.size - 1 ||
	byteIndex == ba.size - 1 && bitIndex < 7
	def next(): Int = {
	val bit = getNthBit(ba(byteIndex), bitIndex)
	bitIndex += 1
	if(bitIndex == 8){
	byteIndex += 1
	bitIndex = 0
	}
	bit
	}
	}

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