Contrib r

Contributing R 3.0.1 with ictce 5.3.0 and special R packages for our Earth Sciences and Environment group
these dependencies are probably intended for the `ese` extensions? We try to stay away from including dependencies that are specific to certain extensions in an R easyconfig (similarly for Perl and Python).

A better solution is to create dedicated easyconfigs for the R libraries that have external dependencies, and simply include a dependency on R v3.0.1 in there.