Fix __init__ docstrings in pylearn2.datasets
Fix __init__ doctrings in pylearn2.{config,deprecated,format,scripts}
Fix __init__ doctrings in pylearn2.distributions
Fix __init__ docstrings in pylearn2.expr
Fix __init__ docstrings in pylearn2.training_algorithms
Merge pull request #2 from vdumoulin/doc_party_ian

Doc party ian