Fix debug printing, add a string-parse test

Really just the start of a string=parse test.
GBM, DRF "polishment"

I like that word "polishment".
Show learn_rate for GBM, mtries, sample_rate, seed for DRF.
Show nbins, minrows, max_depth for both.
GridSearch links to DRF work.
Speel Acurracy Corektaclly.
Remove references to dead ymin.
GBM & DRF ModelView & ProgressPages made identical.