Add 'training_functions'

[GuiSeSanz]

When executing the DTi2vec_newDrug_seting_generatedEMBED.py script it tries to import some functions from the training_functions.py which are not present on the github.

[GuiSeSanz]

I've been able to locate this file on the user's git from another project:
https://raw.githubusercontent.com/MahaThafar/Affinity2Vec/a242fc8e09da7f14d1d8b694a36cef7cae13a439/training_functions.py

But there's still missing a function,
new_drug_cv_data = new_d_cv_setting(DrTr, 100)

Also the simmat files are not used on the code, is this the actual git of the paper?