[PATCH] doc: update copyright year

[Carl Worth]

On Thu, Oct 15 2015, Tomi Ollila wrote:
> -copyright = u'2014, Carl Worth and many others'
> +copyright = u'2015, Carl Worth and many others'

I think the correct approach to copyright here is to expand the range of
years, (so "2014-2015") rather than increment it.

Presumably that means the starting date should be 2009, too.

-Carl
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