[NEW] Created a new projector that is targeted to extruded geometries where the projector can effectively be carried out on 1D strides with constant z-coordinate. The projector is applicable both to the rotational and symmetry interfaces. Both nodal and edge degrees of freedom are accounted for. 


git-svn-id: svn://svn.code.sf.net/p/elmerfem/code/trunk@6731 04224531-1f84-46d8-96ce-875b9e37dce3
Improved the sign detection of strided mortar projector in parallel cases. 


git-svn-id: svn://svn.code.sf.net/p/elmerfem/code/trunk@6732 04224531-1f84-46d8-96ce-875b9e37dce3