[ESS] Using anything.el for R help / object browsing

[Short, Tom]

I added another anything source for local R objects at:

http://www.emacswiki.org/emacs/AnythingSources#toc38

In the anything list, it shows a list of the R objects in your workspace
along with a few details (using ls.str). The default action is str, with
summary, head, tail, print, and dput also available. 

I thought about trying to add details to the larger list that looks
through the whole searchpath. It might be some work as it would require
caching for performance.

- ts