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
Merge pull request #753 from Menerve/logging_expr_gui_linear

Print replaced by logging in expr, gui and linear folders
Remove None from accepted values for *SequenceSpace.make_theano_batch
Add test
added handling of batch size and num batches in ForcedEvenIterator
adapted test_revisit for ForcedEvenIterator
Merge remote-tracking branch 'upstream/master' into uneven_iter
removed debug print
Added a get_layer_monitoring_channels method.
Deprecated the others.
replaced prints by logging in utils
replaced prints by logging in files in root dir