allow to build docs without installing lxml and scikit-learn
requirements-doc.txt
DOC more docs
rename some attributes_ to attributes
DOC better tutorial (work in progress)
DOC tutorial improvements
DOC minor tutorial fixes
DOC split api.rst into several files and other doc improvements
(backwards-incompatible) move create_wapiti_pipeline to webstruct.wapiti
DOC tutorial improvements
a hook for customizing NER.extract results
NER.extarct_groups method
DOC minor tutorial improvements
fix NER extract methods
DOC entity grouping docs
DOC minor entity grouping docs fixes
DOC move NER and Entity Grouping chapters out of parent section