reduced variance negative phase
fix format of reduced variance PCD, add import it required
Merge pull request #692 from goodfeli/varred

reduced variance negative phase
Merge pull request #680 from goodfeli/travis_rebase

Rebase abergeron's travis test_doc and fix docs so it passes
I am confused by git rebase and don't know what this commit actually
does
fixed sphinx build

Conflicts:
	pylearn2/scripts/mlp/predict_csv.py
doc party
doc party!
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
Fix __init__ docstrings in multiple files
removed nfs file that got stuck in Vincent's repo
git is determined to remove this bug fix, i am determined to keep it in