Tahoe Code SVN development

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

beginning of a new contact element library for Tahoe.
at the moment none of the added files are included in
the build system and are only included in the repository
for safekeeping

Descending into sub-directories is no longer done by treating the sub-directories
as targets. This caused problems because some directories were missed and mult-
iple directories were being processed simulatenously. Directories are not hit one
at a time using "for" loops. Also, a common set of suffix rules in now in
macros/suffix
and "make" instructions for the sub-directories are now read from
macros/subdir.targets
NOTE: the make system in the new macros module is not compatible with the
old make system. To rebuild, you must update all modules.

replaced echo and cat with platform-specific macros $(ECHO) and $(CAT)
because some versions of echo do not handle non-printed characters as
needed for "make object_list", that is:
"\t" -> tab
"\c" -> line continuation, i.e., do not end echo with newline
"\\" -> slash

added empty case of HDR, SRC, OBJ, and SUB_DIR lists to
all makefiles even if not empty to provide guide of how
to handle the empty case for all types

revised make files to collect list of all objects and then touch
the module archive only once during an update

revised make files to collect list of all object files and then
touch the module archive only once to update