Depedit

Better support for CoNLLU format and some new features
* New ".*" operator shorthand for unlimited adjacency (e.g. `1.*2` instead of `1.1,10002`)
* New value identity operator, e.g. `1:text==2` means that `1` and `2` must have the same text
* Better control of batch file mode output file names (see --help)
* Automatic insertion of new document and incremental sentence ID tokens
* Support for ellipsis tokens with decimal point IDs (e.g. ID=5.1)
* Bug fixes for better Python 3 compatibility

* Support for conllu
* Batch processing via glob pattern input (python depedit.py *.conllu)
* Better sentence annotation handling with S:key=val instructions:
* 'last' feature to stop processing a sentence if a rule is matched
* 'position' features indicating first, mid or last position in sentence
* Support for conllu field names as aliases: form|upostag|xpostag|feats|deprel|deps|misc

Better importability
- Can use from depedit import DepEdit
- Function to add transformations in code