rpy2

recipe uses native R installation because we want to manage ourselves
less test imports for lucid-rpy2-wtf

many threads on conda's github relating to python/readline.
mostly [this](https://github.com/ContinuumIO/anaconda-issues/issues/44).
no amount of fiddling got all the imports to pass when building in
lucid, but the recipe works in lucid. so that's cool I guess.
Merge pull request #11 from TheClimateCorporation/rpy2

Rpy2