Ud2ude

BUGFIX:
- case propagation in conjunction:
- propagate case in conj only to caseless conjuncts (11 )
- promote this conversion before adding labels on edges (12 )
- expand to markers of advcl/acl (13 )
- fixed: Passive alteration clashes with currect passive subject bug (5 )

API changes:
* changed behavior of remove_node_adding_conversion API boolean: when True, instead of adding the STATE node, we use the least EV instead, mostly being the copula. (see 7).
* Added tests (pytest, circleci).
* Changed order of conversions, to avoid erroneous conversions.

Conversion changes:
* case-propagation-in-conj (see 9).

BUGFIX:
* Stop removing enhancedUD++ conversions when intending to remove enhancedUD conversions.
* In demote_quantificational_modifiers conversion stop removing sons that we just added to the node.
* Conversion-iteration: represent the graph uniquely enough so convergence won't occur too early.
* In extra_conj_propagation_of_nmods: make regex more precise.
* In conj_propagation_of_poss: reduce false positives using a better regex filter.
* In extra_evidential_reconstruction: prevent infinite loop.

* **API changes:**
* Add spacy pipeline (Converter class which can be used as spaCy's pipeline component after parser).
* Add new optional bools to dominate which conversions will be applied (backward compatible).
* Label structure revisit.
* Moved to python 3.7

* **BUGFIX:**
* Make xcomp + participles applied only to verbs.
* Prevent passive multi-iteration respawn.
* Appos_propagation - arc in the wrong direction.
* Prevent duplicate matches in Matcher.
* Deal with parser mistakes in conj propagation.
* Advcl iids were wrong for ALT mode.
* Prevent expand_pp_or_prep_conjunctions to loop forever because it always finds the same match.

* **Conversion changes:**
* Added copula & evidential & aspectual reconstruction, compound_propagation, of_prep_alteration (see paper for full description).
* Make xcomp_propagation more genere, by letting all kinds of 'to' (e.g. wanna).
* Add UNC to indexicals.
* Revisit acl_propagation.

* **Name change:** removed my username from the package name.
* **API changes:**
* Added an optional argument for canceling any of the conversions functions - mainly for ablation test. (backward compatible).
* Added a new API function get_conversion_names (no arguments).
* **BUGFIX:** in the odin-format conversin, we've treated only inputs that include an odin-json to enhance. So fixed to be general. (backward compatible)
* **Conversion changes:**
* For the "[] >nmod [] > advmod []" dependency path, for the special cases (closed list named nmod_advmod_complex), instead of replacing the edges (previously being replaced), we simply add the new ones and leave the old ones unchanged.