Merge branch 'master' into development

Merge branch 'development' into 'master'

v4.8.1

See merge request rml/proc/rmlmapper-java!102

Merge branch 'development' into 'master'

v4.8.0

See merge request rml/proc/rmlmapper-java!95

version 4.7.0

Merge branch 'development' into 'master'

v4.6.0

See merge request rml/proc/rmlmapper-java!85

Merge branch 'development' into 'master'

Release v4.5.1

See merge request rml/proc/rmlmapper-java!72

Merge branch 'development' into 'master'

Release v4.5.0

See merge request rml/proc/rmlmapper-java!65

Merge branch 'development' into 'master'

Release 4.4.2

See merge request rml/proc/rmlmapper-java!60

version 4.4.1