Fixed wrong number being shown in _repr_pretty_

Fixes #139
Advice on logging in IO classes
Merge pull request #142 from rproepp/master

Docs on logging in IO classes
move neo.core test files into own directory
move generate_datasets to neo/test directory
make generate_datasets annotations consistent
refactor fake_neo to be more complete and predictable
refactor test_generate_datasets
improve merge functionality and documentation
refactor assert_neo_object_is_compliant
refactor container core tests
create common container base class and refactor container classes to use it
Merge pull request #143 from toddrjen/container

Add container base class
Fix read_params ( issue #146 )
handle lazy_shape in spiketrain array_finalize
split path handling into own function in iotest/tools.py
Use logging and BrainwareSrcIO cleanups
use EventArray in BrainwareSrcIO