GiNaC/ginac clifford.cpp color.cpp constant.cpp constant.h idx.cpp indexed.cpp mul.cpp symbol.cpp symbol.h tensor.cpp utils.h

[Christian Bauer]

Update of /home/cvs/GiNaC/ginac

Modified Files:
	clifford.cpp color.cpp constant.cpp constant.h idx.cpp 
	indexed.cpp mul.cpp symbol.cpp symbol.h tensor.cpp utils.h 
Log Message:
- symbols can have a LaTeX name, e.g. symbol s("s", "\\sigma");
- LaTeX output of indexed objects and tensors is much nicer
- simplify_indexed() can do arbitrary contractions in Dirac gamma strings
- constructing expressions like
    (x * dirac_ONE() + dirac_ONE()) * dirac_gamma(mu)
  resulted in an exception because mul::simplify_ncmul() wasn't implemented
  (maybe afrink didn't anticipate that an implementation would really be
  needed...)