add R ggplot package
add ggplot as external dependency
Merge branch 'master' of https://github.com/bgruening/galaxytools
Merge branch 'master' of https://github.com/bgruening/galaxytools
Merge branch 'master' of https://github.com/bgruening/galaxytools
Merge branch 'master' of https://github.com/bgruening/galaxytools
shift over to the PubChem CSV tables and to not use the concise ones, add aid as tabular output