oncotree updates

[jharenza]

PNET is no longer a recognized entity and additional subtypes have been created, but are not reflected in the current oncotree - is there a plan to update this? Medulloepithelioma was also removed and CNS embryonal tumour with rhabdoid features, CNS embryonal tumor, NOS added.

Similarly, ependymomas and high grade gliomas were further molecularly characterized, so would be great to add all of these new entities to the oncotree.