[dcl.decl] Move requires-clause into declarator.
[dcl.fct] Exlude constraints from the type of a function.
[edit] Update editorial comments.
[dcl.fct.def] Remove unnecessary section.
[class] Remove unnecessary section.
[dcl.fct] Match requires clauses for function declarators.
[dcl.decl] Add reference.
[edit] Regen documents.
Merge pull request #70 from jicama/master

More fixes
Merge branch 'fn-decl'

Conflicts:
	concepts.html
	concepts.pdf
[temp.constr] Apply wording updates to p2-4.
[various] Editorial wording fixes.
[edit] Remove ill-formed tag.
[temp.constr.atom.deduct] Explicitly define in terms of
abbreviated function templates.
[temp.deduct] Apply wording changes.

Don't talk about concept checking.
[temp.expl.spec] Use non-template function.
[temp.explicit] Explicit instantiation of members.

Only when the constraints are satisfied.
[temp.inst] Add examples for member templates.
[temp.inst] Make certain programs ill-formed.

No diagnostic required.
[temp.over.link] Editorial updates in p6.