added could_be_coindexed feature (two non pronominal entities can't be coindexed if separated by just a preposition)
added dist_ten (true when dist<=10)
added more Ng and Cardie's inspired stuff
removed test for condition_B_met (didn't write that function after all...)
corrected very stupid mistake in i_is_subject...
First round of corrections
Corrected __get_parent_tree__. Now if a token spans a full NP, it returns that NP and not its parent.
Corrected __get_parent_tree__. Now if a token spans a full NP, it returns that NP and not its parent.
added a None condition to Julia's max_projection function (I think she was working on a fix in parallel, so her solution can supplant mine); added contains_pn feature
added a few more Ng&Cardie features, including wndist
branch ready to merge (last feature added: meet_all_constraints (Julia))
added more features, the SEM_CLASS dictionary and  some composite features
added more features, the SEM_CLASS dictionary and  some composite features
more WordNet features
more WordNet features
more WordNet features
merged master with keelan and julia
merged all branches need to test
fixed feature_functions imports