Merge branch 'release/1.8'
Merge branch 'release/1.8'
Merge branch 'develop'
Merge tag 'v1.10.0'

[maven-release-plugin]  copy for tag v1.10.0
Update CONTRIBUTING.md

fix typo
bootstrapper accepts metadata passed in constructor
added r2rml javadoc comments
fix the missing jsqlparser problem in protege plugin
Merge remote-tracking branch 'origin/develop' into feature/multiSchemaFullMetadataTest
Merge branch 'feature/multiSchemaFullMetadataTest', remote-tracking branch 'origin' into feature/multiSchemaFullMetadataTest
Merge branch 'feature/multiSchemaFullMetadataTest' of github.com:ontop/ontop into feature/multiSchemaFullMetadataTest
Added test using target sql with multiple aliases to the same table, and
a reference to the second occurrence.