Merge pull request #477 from tledoux/goodxmp

Correct XMP output and add unit test for XMP.
Merge pull request #478 from tledoux/goodxmp

Correction of bad namespace uri
remove deprecated node_server package include
Create messages_es.properties
Merge pull request #482 from Cuadratin/patch-4

Create messages_es.properties
Update README.md
XMP correctness.

Correction of the premis prefix
Add the parseType of the RDF reources
Correct the NPages attribute
Add 3 more test cases to validate the fonts