[aur-general] merge request

[G. Schlisio]

please merge r-rgl [0] into r-cran-rgl [1], as the latter follows the 
common naming scheme and is up to date.
about name scheming: there seem to be 2 groups of naming. r-<name> and 
r-cran-<name>. obviously i prefer the latter (try searching cran in 
aur). is it ok to update and rename to that naming scheme?
thanks

[0] https://aur.archlinux.org/packages/r-rgl/
[1] https://aur.archlinux.org/packages/r-cran-rgl/