* Fix model saving from tagger training.
* Whitespace
* Move test out of compilation in fabfile
* Remove features
* Remove unnecessary class
* Whitespace
* Fix big efficiency regression from when I did the lattice parsing implementation. On copy_state, limit which parts of the arrays we copy, particularly for l_children and r_children.
* Remove unused code from _state
* Replace at_end_of_buffer with function
* Replace is_finished property with a function
* Remove s.second property, replacing it with a get_s1 method.
* Remove commented out code
* Remove unused function from _state
* Fix type on perceptron epoch
* Fix compile error in sentence
* Remove dead code from perceptron
* Remove unused, bad variable dec
* Fix all remaining warnings for perceptron
* Avert type comparison warning
* Compile perceptron with extra optimisation