Tahoe Code SVN development

pree-weekend commit
begining of elemennt connectivity and equation number stuff

now the 2d search works (at least as well as the 3d version)

Now with new and exciting "const"s all over the place
the contact code builds w/o warnings on the linux egcs
compliers (on to the DEC's)

fix some of the "const" madness in my neck of the woods

the dang thang now has a working search
(at least for quad faces)

onto residual and stiffness...

Alleviated some compiler warnings and added some more.

Checkin of code written over weekend.
(search is not operational as of yet)

a pre-weekend commit of contact code
(the search is on the verge of being useful)

skeleton is growing:
o added vector operations headers for 2d/3d
o contact node data class to wrap-up opposing surface info
o added skeleton of 2D enforcement

returned access functions to "const" and copied data for output instead

clean up warning/error regarding access function to FaceT's
connectivity (more input parsing too...)