By Daniel Berthereau: Changed cvs HEAD from 6.x to 7.x release.
By Daniel Berthereau: Merged all taxonomy-csv 7.x branches except 7.x-1.
By Daniel Berthereau: Modularized and simplified code and reintegrated line api.
By Daniel Berthereau: Use of new features of Drupal 7 (UI and Field).
By Daniel Berthereau: Implemented synonyms and related terms in 7.x release.
By Daniel Berthereau: Cleaned structure of user interface.
By Daniel Berthereau: Improved speed of tree and polyhierarchical import.