GiNaC/ginac clifford.cpp clifford.h expairseq.cpp indexed.cpp indexed.h ncmul.cpp ncmul.h normal.cpp

[Christian Bauer]

Update of /home/cvs/GiNaC/ginac

Modified Files:
	clifford.cpp clifford.h expairseq.cpp indexed.cpp indexed.h 
	ncmul.cpp ncmul.h normal.cpp 
Log Message:
- simplify_indexed() renames dummy indices so, e.g., "a.i*a.i+a.j*a.j" gets
  simplified to "2*a.i*a.i" (or 2*a.j*a.j, you can't know which one)
- fixed possible crash when calling subs() on expressions with non-commutative
  products
- added canonicalize_clifford()