scilab: remove useless exit
scilab: new test scilab_li_matrix for matrix.i library
scilab: move tests in correct test section
scilab: fix li_std_set_as_argument test (strings are returned as row vector)
scilab: fix inout test
scilab: fix naming in scichar.swg (SwigScilabString... => SWIG_SciString...)
scilab: cosmetic fix in li_std_sequence_container_typemaps
scilab: remove disp int test
scilab: implement test li_std_string
scilab: fix li_attribute_template test