Fix use of static function deprecated in Sesame-2.8
Add sesame-bom for dependency version management

The sesame-bom is designed to be used in dependencyManagement to ensure that all sesame dependencies have the same version when the reactor runs.
Bump to Sesame-2.7.12 where the sesame-bom was first defined
Merge pull request #219 from ansell/rdfformat-constant

Fix use of static RDFFormat.valueOf function
Merge pull request #220 from ansell/sesame-bom

Add sesame-bom for dependency version management
speed fix for owl2obo

Replace inefficient code to speed-up conversion from owl to obo. For GO
this is now running in seconds instead of hours
bug fix: incomplete OBO writes

Always flush the buffer after writing
bug fix: missing [] for synonyms
add test for missing synonym brackets
bug fix: missing labels in comments

Use the whole ontology, and not only the OBO doc, to resolve names
Merge pull request #222 from hdietze/version4

Version4