Namespaces for GiNaC and xloops

[Christian Bauer]

Hi!

GiNaC and libxloops are now put into their own namespaces ("GiNaC" and
"xloops", respectively). If you're using GiNaC/libxloops in your own
programs, it should be enough to add

  using namespace GiNaC;
  using namespace xloops;

after the #include <ginac/ginac.h> or #include <lib/xloops.h> to make
things compile again.

Bye,
Christian

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