* Group text lines if they are centered (#382)
Closes#382
* Add comparison private methods to LTTextLines
* Add missing docstrings
* Add tests for find_neighbors
* Update changelog
* Cosmetic changes from code review
* Default value for --all-texts should be false, because using the flag enables it
* Fix edge case: when no neighbors are found a line should form its own text box
* Added test for grouping textlines where 1 is outside the parent bounding box
* Added CHANGELOG.md line