[GiNaC-cvs] GiNaC/ginac clifford.cpp clifford.h color.cpp color.h indexed.cpp

[Christian Bauer]

Update of /home/cvs/GiNaC/ginac

Modified Files:
	clifford.cpp clifford.h color.cpp color.h indexed.cpp 
Log Message:
- added variants of dirac_trace() and color_trace() that take the trace over
  more than one representation label by specifying a set or list of labels
- diracgamma::contract_with() uses Chisholm identities in 4 dimensions to
  produce more compact results
- added missing documentation for options parameter of simplify_indexed()