Update documentation structure
Update model documentation
Refactor groundhog middleware
PEP8
Fix bug
`train` and `plot` modes
No need to deepcopy signature

... as a new one is created every time
Remove basicConfig call from bricks.py
Unbroadcast them all (Theano issue 1772)
Propagate initialization config to wrapped
No need to deepcopy signatures
default cutoff_rescale_length for groundhog
First regularization ever: noise addition
Case study works
Refactoring: rename `child` to `wrapped`
PEP8
Case study documentation