ping^5 [docs] Merge trees and generic chapters in internal docs

[Jerry Quinn]

On Wed, 2010-03-10 at 18:21 +0100, Gerald Pfeifer wrote:
> On Wed, 10 Mar 2010, Jerry Quinn wrote:
> > http://gcc.gnu.org/ml/gcc-patches/2010-02/msg00222.html
> > 
> > The patch merges the chapters on trees and generic into a more
> > consistent single chapter, and separates GENERIC trees from the ones
> > specific to C++ in a hopefully more logical manner.
> 
> I'm fine with this in principle wearing my doc hat, but really feel it 
> would be better for a middle-end oder global maintainer to review.

Any middle-end maintainers have a few spare minutes to look at this?  I
pretty much just moved information around.  I had hopes of putting it
into trunk, but if it needs to wait for 4.6, so be it.