Fix/license for cran

I'm not certain that this is the right incantation but taking a bit of inspiration from e.g. 

<http://cran.rstudio.com/web/packages/optparse/COPYRIGHTS>

I can offer this small patch to get things rolling again.
Listing ActiveState in DESCRIPTION under ``role = "cph"`` is good for
keeping CRAN happy.

As Gregory points out the "Copyrights" field in DESCRIPTION is a good place
for preserving
all the short copyright notices like the ActiveState copyright notice which
under the MIT license must be preserved somewhere or
 you could probably change file LICENSE to something like:

YEAR: 2010, 2014
COPYRIGHT HOLDER: ActiveState, Hadley Wickham, RStudio

which probably fulfills the spirit of the MIT requirement to "preserve
copyright notice" without requiring a separate "Copyrights" field or
COPYRIGHTS file (the COPYRIGHTS file is useful if combining code from a
very long permissive license with code under the GPL like I did in the
argparse/optparse packages but probably overkill when all the code is under
a single permissive license).  FYI when you use a COPYRIGHTS file to in
order to fulfill the "preseve copyright notice"  requirements of all your
licenses you still need duplicate a list of all the authors and copyright
holders in DESCRIPTION to satisfy CRAN.

Technically if people have been contributing code (4+ lines) to the project
under the MIT license and not explicitly assigning copyright to RStudio or
Hadley then there should probably be even more copyright holders in LICENSE
or the "Copyrights" field of DESCRIPTION although given that they are all
properly credited in DESCRIPTION and the package is released
non-commercially under such a permissive license I doubt that any of the
contributors or CRAN care strongly that this copyright information is
recorded perfectly although ActiveState is a company and maybe cares more
strongly.

Trevor



On Thu, Aug 21, 2014 at 9:28 AM, Hadley Wickham <notifications@github.com>
wrote:

> In DESCRIPTION:
>
> >  License: MIT + file LICENSE
> > +Copyright: Original python appdirs module copyright (c) 2010 ActiveState
>
> I think you want role = "cph"
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/hadley/rappdirs/pull/17/files#r16550093>.
>