Merge pull request #428 from ontohub/correcting416_use_author_timestamps_in_history

Use author instead of committer timestamp, fixes #416.
Compressed dispensable code.
Merge pull request #426 from ontohub/correcting412_download_of_ontologies_does_not_work

Repair of download of ontologies, fixes #412.
add tests for repo type detection
fix lib function for git repo detection
remove js routes from assets (unused)
make repository detect repository type automatically
Merge branch 'augmenting419_repo_type_detection' into develop