updated packages: r-cran-afex, r-cran-logspline, r-cran-desolve

[Jonathon Love]

hi folks,

i've updated the following packages, and pushed to alioth:

 - r-cran-afex
 - r-cran-logspline
 - r-cran-desolve

could someone review, and push these to the upload queue?

with thanks

jonathon