#34 code examples 55,56 outdated(?)

[Paul Seyfert]

(neither spectacular nor urgent)

In the current version of the TMVA user guide (from the TMVA webpage) examples 55 and 56 use the method:
TMVA::MethodCategory::AddCategory
which I don't see in the source code. looking at the example script in the current master branch of root/tutorials, i think it the method is called
TMVA::MethodCategory::AddMethod