small fix.


git-svn-id: svn://svn.code.sf.net/p/elmerfem/code/trunk@6923 04224531-1f84-46d8-96ce-875b9e37dce3
Changed the way how soft limiters can be applied so that the residual is computed within the assembly loop. This is better fitting for nonlinear cases where the stiffness matrix may have changed since last iteration. At the same time reorganized the code so that the Nodal Loads are computed in a separate subroutine and the user may specify whether to use the standard or bulk values for the computation. 


git-svn-id: svn://svn.code.sf.net/p/elmerfem/code/trunk@6924 04224531-1f84-46d8-96ce-875b9e37dce3
missing from last commit...


git-svn-id: svn://svn.code.sf.net/p/elmerfem/code/trunk@6925 04224531-1f84-46d8-96ce-875b9e37dce3
Further improvements of the nonolinear contact model. It is now default and the linear model must be retrieved using keyword 'linear apply limiter'. 


git-svn-id: svn://svn.code.sf.net/p/elmerfem/code/trunk@6926 04224531-1f84-46d8-96ce-875b9e37dce3
Reverted the limitear default back to the original linear limiter since the new system would not work yet in parallel. 


git-svn-id: svn://svn.code.sf.net/p/elmerfem/code/trunk@6927 04224531-1f84-46d8-96ce-875b9e37dce3