- replaced Jetty MulpiPart by Commons fileupload
- fixed file upload pretty bug
- implemented fileupload destruction

- added some Cell grammar

- fixed entity order

Modification of queries generation (on fr.inrialpes.exmo.align.impl.renderer.GraphPatternRendererVisitor) for using federated queries + first test for SPARQLSelectRendererVisitor

Fixing static vars to class var + getting hability to retrieve queries on GraphPatternRendererVisitor

- Reengineered

- Implemented always blank in construct

- moved convertExtensions to Extensions