Rename ConcatenateWISTRFeatures -> ConcatenateFiles and extend to arbitrary #'s of source dirs
ToponymWikiSrc: Use @@@ divider instead of |, changed in processwiki.py because of possible nested template calls in links
ToponymWikiSource: Catch error parsing numbers (esp. if dividers or partial dividers occur in anchor text or article names)
ToponymWikiSource: only output messages if verbose=true; recognize lowercase states and two-char abbrevs;
SupervisedTRFeatureExtractor: Add --corpus-format in place of --use-gold, support 'toponymwiki' format to read directly from 'processwiki.py --generate-toponym-eval', add --verbose and only display msgs if enabled; pass thru to ToponymWikiSource