SimplyTypedSpace._validate_impl now checks that self.dtype's int-ness agrees with the incoming batch's
added test for validating batches' dtype, de-whitelisted space/__init__ from pep8 checking
Added documentation and tests for mean_pool function
bugfix in new_norb.py, browse_norb.py can now show monocular NORB datasets saved as .pkl files.
made _validate_impl less strict, allowing for loss of precision on cast
Merge pull request #1173 from SuperElectric/norb_clean

bugfix in new_norb.py, browse_norb.py can now show monocular NORB
Merge pull request #1163 from SuperElectric/ticket_1160

Fix for ticket 1160
Merge pull request #1169 from kastnerkyle/ccw_mean_pooling

[DOC] Added documentation and tests for mean_pool function
Use miniconda in Travis