GiNaC/ginac ex.cpp ex.h indexed.cpp indexed.h inifcns.cpp inifcns.h normal.cpp

[Christian Bauer]

Update of /home/cvs/GiNaC/ginac

Modified Files:
	ex.cpp ex.h indexed.cpp indexed.h inifcns.cpp inifcns.h 
	normal.cpp 
Log Message:
- added numer_denom() to get numerator and denominator in one pass
- symmetrize() and antisymmetrize() are available as ex methods
- minor cleanups