renamed read() methods to fromstring(), c.f. https://github.com/nltk/nltk/issues/658
Merge pull request #659 from jskda/pull_request.658

renamed read() methods to fromstring(), c.f. https://github.com/nltk/nltk/issues/658
fixed model0 example bugs
Merge pull request #660 from jskda/develop

fixed model0 example bugs
Uses True and False instead of 1 and 0 for return values.
Merge remote-tracking branch 'upstream/develop' into develop