Removed most of the template metaprogramming code. This simplifies the code, simplifies

some compiler warnings, and makes FieldVectors of size larger than 500 possible.

I left in the TMP for the norms of FieldVectors, because you can't remove it without
introducing a temporary, and I didn't want to do that without measuring the effects.

Also:  FieldVector::print() is deprecated now.  Please use operator<< instead.

[[Imported from SVN: r4695]]