Merge tag 'v1.13'

[maven-release-plugin]  copy for tag v1.13
Merge tag 'v1.13.1'

[maven-release-plugin]  copy for tag v1.13.1
Update README.md
SesameRepositoryConfig is now checking for file existency.
Different error message when file paths are missing and when they do not exist.
Some vocabulary URIs have been automatically updated by the IDE. Fixed.
Merge branch 'develop' of github.com:ontop/ontop into develop
Trying to remove Daide
In-depth configuration validation before creating repositories.
closeToSolution
Minor update of the validation step.
Merge branch 'develop' of github.com:ontop/ontop into protegeBugfix
canRead() test now explicitly added for the OWL and mapping files.
Merge branch 'develop' into bugfix/sesame-workbench
Fetch Sesame dependencies
Merge branch 'bugfix/sesame-workbench' into develop
Dag's HAck
Dag's bugfix
Merge branch 'develop' of github.com:ontop/ontop into protegeBugfix
Merge branch 'develop' of github.com:ontop/ontop into develop