Tahoe Code SVN development

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...)

it now parses output and then, after a small excuse, quitely retires

spending more time documenting my C++ naivete (sp?)

typo in the destructor

reduce the number of errors in the new code and add a ContactSurfaceT.cpp

A bigger better skeleton* of a quadrature-based contact element framework

*note : skeletons are dead and typically useless.

add $Id$ to cvs header at top