add information attributes to mesh

[nikita-petrashen]

It would be very convenient to access Mesh.label and Mesh.fullName from Python directly via class attributes. Or is it possible and I just didn't find the way to do this?

[nikita-petrashen]

Also the messages sent to std::cout are not displayed in Jupyter notebooks, here's a possible way of overcoming this

[alemuntoni]

Thanks for the suggestions, @nikita-petrashen.
I was already working on adding label and fullname to meshes, but it is not easy at the moment, and lot of reorganization in the codebase of meshlab is needed first. When this will be done, it will be possible also to iterate over meshes into the meshset, for example.
I hope to make this available in the next version of pymeshlab, but I cannot promise anything at the moment.