prepare for maven release (#15)

* prepare for maven release

* Update README.md

* Create LICENSE.md

* Delete LICENSE.md

* Delete LICENSE

* Create LICENSE

* Update README.md

* update pom

0.4.0 (#14)

* added lemma test for subject-verb-agreement errors + tests

* small semantic clean

* remove dummy tests

* cleaned Annotation.toString from class names

* format docs

* clean class instance annotation from tests, made setup static

* added hasError method to annotation

* removed setGrammaticalError from Annotation

* remove matches from Annotation

* remove transform from Annotation

* * removed isIgnored and isNoneOrIgnored from GrammaticalError
* removed isIgnored filter from en annotation test
* rename EnAnnotatorTest to EnAnnotatorWithCoreNlpTest

* * removed isOther from GrammaticalError
* removed isNone from GrammaticalError
* refactored hasError in Annotation

* * added empty lists annotator test

* fix namings

* fix naming

* Error Marker init

* * added utility methods for Annotation to get source/target tokens, text and position
* removed static factory from Annotation that accepts only edit - error should always be explictly set
* general refactor and breaking changes for internal implementations

* change use of Token.writeText to TextUtils...

* Revert aligner to version 3.0

Update README.md

0.2.0 (#12)

* minor cleanups

* Annotator interface

* update example

* update example

* bump to 0.2.0

* aligner 0.2.0 - use Edit.project instead of mapSegments

add maven version plugin