Start collapsing class hierarchy
Naively cram Negotiated and Rendered into Simplate
Rough merge of three classes in same file
Start fixing up test suite
Fix the rest of the test suite

Going with nomenclature "bound" and "unbound" simplates (for the former
rendered and negotiated resources, respectively).
Prune crusty docs
Revise docstring
Reify is_bound

I'm finding this nomenclature useful for talking about simplates
(resources) that are bound to a specific media type by a file extension,
vs. those that aren't.
Start folding down to one simplates doc
Static doc was just plain wrong
Fold /simplates/rendered/ into /simplates/

Removed some old redirects along with this. As we head towards sphinx
docs we'll be moving away from One True Website and towards version-
specific docs.
Fold /simplates/negotiated/ into /simplates/
Simplify {min,max}_pages computation
Simplify legend computation
Merge pull request #404 from gratipay/simplate-resource

simplify class hierarchy