replace reporting code with submodule. closes #811

.gitmodules

matlab/dynare_config.m

matlab/modules/reporting

matlab/reports/@graph/addSeries.m

matlab/reports/@graph/display.m

matlab/reports/@graph/end.m

matlab/reports/@graph/graph.m

matlab/reports/@graph/subsasgn.m

matlab/reports/@graph/subsref.m

matlab/reports/@graph/write.m

matlab/reports/@graph/writeGraphFile.m

matlab/reports/@page/addSection.m

matlab/reports/@page/display.m

matlab/reports/@page/end.m

matlab/reports/@page/numSections.m

matlab/reports/@page/page.m

matlab/reports/@page/subsasgn.m

matlab/reports/@page/subsref.m

matlab/reports/@page/write.m

matlab/reports/@paragraph/display.m