Correcting a recently introduced bug in nonlocal isotropic damage material.
Added documentation to axisymmetric elements. Updated unv2oofem for 1 axisymmetric element.
Added tests on linear axisymmetric elements for sm module.
Fixing generation of html version of elementlibmanual
Fixing store/restore context methods (adding missing variables), added preliminary support for load balancing (not calibrated)
Fixed nrsolver convergence checker if there are slave dofs in use.