There are bugs in some codes

[mantras-cloud]

1. in dataloader.py: function _load_cg and function _load_tg: As shown in the figure，the 'cg_fnames'(line 69) and the 'tg_fnames'(line 84) has included the full path, so the code in line 73 and line 88 shoule be modified as shown in their respective next line.
   
2. in histocartography/ml/models/hact_model.py : function _compute_assigned_feats:As shown in the figure，the code in line 171 should have brackets at the end. Besides, the code in line 175 should be modified as in line176.
   
3. in histocartography/utils/graph.py function set_graph_on_cuda(graph): the code should add some as shown in the red box in the figure.
   

Maybe some of these problems are caused by my computer hardware, but I did make the above changes while debugging your code. And thank you very much for your work, which has benefited me a lot.
looking forward to your reply！