- moved convertExtensions to Extensions

- all logging through slf4j
- all command-line parameters through commons cli, duly tested

- suppressed any trace of log4j

- trapped null pointer exception when a URI cannot be derefenced in the ontology (toObjectAlignment)

- rationalised toURIAlignment (ObjectAlignment)
- rationalised extension update in BasicAlignment
- added tests for these functions

- Values are necessarily strings
- Alignment and Cell extensions have been rewriten

- improved clone() and algebraic operation by puttin in common alignment creation

- reimplemented init( onto, onto, cache ) in function of init( onto, onto ) in BasicAlignement
- transformed INRIA Rhone-Alpes into INRIA
- new OMWG has only init( onto, onto ) implemented and no reference to cache

- Started to put copyright notices to INRIA instead of INRIA Rhone-Alpes (misc)

        -> solves a database storage bug