added include to fix compilation break on GCC
maintenance commit
added missing header file
no scope spec in function declaration
corrections to nodal force output
modified 2D neighbor search algorithm - now works properly
More work on MD/THK, new neighbor search algorithm 1D tested, passed
This commit was manufactured by cvs2svn to create branch 'BRANCH_Surface'.
Updated ComputeOutput to use real stresses. Other minor adjustements.
more work on cleaning up the BSM and MD/THK stuff
