replaced prints by logging in datasets
replaced prints by logging in devtools
added uniform_batch_size property
added use of has_uniform_batch_size function
Merge remote-tracking branch 'upstream/master' into uneven_iter
replaced prints by logging in expr
replaced prints by logging in gui
replaced prints by logging in linear
Remove MNIST reference in IndexSequenceSpace
Fix bug in VectorSequenceSpace
Merge pull request #752 from Menerve/logging_datasets_devtools

Print replaced by logging in datasets and devtools folders
Add roc_auc.py
Roll back suggested changes in master
Add blank line
fix minor bug
module docstring
module docstring
format
Merge pull request #748 from AlassaneNdiaye/fix_docstring_format_check

Fix to docstring format check.
doc for dataset