update gitignore

.gitignore

 anonymous.md
+.venv/
 venv/
 **__pycache__/
 /data/
 /trainings/
 *.log
+*slurm*.out
+
 libs/STIR_build
 
 jupyterhub*
 .ipynb_checkpoints/
 notebooks/
+
 tmp/
+train_data/
 cgan_random_search/