[MRG+1] PR for model_evaluation.rst changes to fix issue #3661, "Document negation of loss as scoring parameter"

* doc/modules/model_evaluation.rst in the MattpSoftware fork contains my changes for issue #3661.

* issue-3661/model_evaluation_copy_edited.rst also fixes typos I found when reading the document.

* issue-3661/model_evaluation_edit_notes.txt has the explanation for the changes in model_evaluation_copy_edited.rst, and flags a few other other items for questions.
Changed to "loss, score, and utility functions" throughout.

On Wed, Oct 1, 2014 at 4:35 PM, jnothman <notifications@github.com> wrote:

> In doc/modules/model_evaluation.rst:
>
> > @@ -174,10 +205,10 @@ Classification metrics
> >
> >  .. currentmodule:: sklearn.metrics
> >
> > -The :mod:`sklearn.metrics` implements several losses, scores and utility
> > +The :mod:`sklearn.metrics` module implements several loss, scorer, and utility
>
> These are not scorers, but score functions
>
> —
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> <https://github.com/scikit-learn/scikit-learn/pull/3706/files#r18315295>.
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