Sage update

[Montgomery-Smith, Stephen]

Hey people,

I have started to think about making sage compatible with FreeBSD-10.
The main problem thus far is that clang's c++ compiler is missing some
stuff like the include file ext/numeric.

I don't know if clang's c++ compiler is far behind gcc-4.7, or whether
it is a question of merely copying a few include files from gcc-4.7.

I just committed a change to the sage port (revision 354274) where if
you want to see if it compiles with clang, just comment out the
USE_GCC=yes line in the Makefile.

One subpackage that breaks fairly early on is ratpoints.  It has a
function defined inside of another function.  If anyone is interested I
can send them my patch to fix this.  But you will find other subpackages
that break as well because it is not able to find include files.