* Fix for python3, as the iterator returned by the map will be empty after logging.

* Fix PTB example according to upstream changes.

simplify FixedUnpooling with tensordot, add NCHW support (but not for the special 2x2 case) (fix #314)

* Add name to logger.autodir for different runs and simplify
similarity learning (incl. removing tf.FLAGS in favor of argparse)

* remove 'required' from mnist-embedding.py

* next fix

* c'mon travis

* Update logger.py

* fix linting..