Style fixes + more iterative

Made iterative versions of  _GetLengthHelper and
_GetTValueAtLengthHelper.   Baseline tests show that they do the same
thing as recursive versions but more tests may be needed.
Merge branch 'brady_pythonify' of https://github.com/brajac709/RankPanda into brady_pythonify

Conflicts:
	RankPanda/RankLocation.py