Minor changes to give a title to the tutorials

tutorials/fit/fit2.C

tutorials/fit/fit2a.C

tutorials/graphics/mandelbrot.C

tutorials/graphics/manyaxis.C

tutorials/graphs/motorcycle.C

tutorials/gui/mditest.C

tutorials/io/hadd.C

tutorials/mlp/mlpHiggs.C

tutorials/mlp/mlpRegression.C

tutorials/pythia/pythiaExample.C

tutorials/quadp/portfolio.C

tutorials/xml/DOMParsePerson.C

tutorials/xml/DOMRecursive.C

tutorials/xml/SAXHandler.C