D-Net

Ignore test as it requires a running virtuoso server

API for storing on virtuoso

keep playing with virtuoso

added springboot app and controller

Added spring-boot main and controller classes. Solved log4j conflict among jena and springboot (strange, isn't it? :-( )

Transformed in springboot application because jena gets in with a dependency to jackson that conflicts with the one of exist

JobNodes to work with Virtuoso

reformat code

added comment

VirtuosoClient and some tests assuming there is a local virtuoso server (hence ignored)