[Rd] 'sessionInfo()' instead of 'version'

[Seth Falcon]

On 29 Dec 2005, murdoch at stats.uwo.ca wrote:
> So far the following reasonable suggestions have been made.  I
> forget where they were posted, so you may not have seen them:
>
> - the Subversion revision number, at least for non-released versions
> - the version number of the GUI, at least for OS X (where it changes
> independently of R).

Perhaps it doesn't count as reasonable, but another suggestion (made
by me) was:

 - Include output of loadedNamespaces().

+ seth