Adapt the code to accept Trees with Branches containing structs

[duartej]

The code has to be modified (at pytree.init ) in order to accept branches containing struct, for instance a branch what was built as,

TTree::Branch("evtinfo",&evtinfo,"run/Int_t:evt/Int_t");

[duartej]

Just check if (branchesCol.At(i).GetClassName() has no value (empty string), then check if the Branch has more than 1 leave, len(Branch.GetListOfLeaves()) > 1, then substitute the content of the branchesCol.At(i) (where is found the branch) by the all the leaves the branch has, so the branchesCol increases its size