add NLL cost
fixed run_deep_trainer and updated the docs
added a unit test for the run_deep_trainer.py
correct the bugs
Merge pull request #197 from goodfeli/master

Small, miscellaneous
Merge pull request #200 from goodfeli/master

Small, miscellaneous
Merge pull request #202 from goodfeli/master

Spellcheck for environment variables
Merge pull request #204 from goodfeli/master

Doc, new nnet expressions
fixed Softmax
more fixes
Merge pull request #187 from yaoli/master

fixed the scripts/deep_trainer
fixed error message
Merge branch 'master' of github.com:lisa-lab/pylearn2