made metadata value generation more stable
display parent ontologies first
sort files: master file first
'ontologies defined by this file' are only shown in defining file
remove parens
show different icon on master file
only create an ontology if there is no master file yet
fix tests: ontologies are only created for the master file
optimize team_permissions query by using pluck

pluck allows us to extract fields directly from
a query without the need to instantiate model
objects (very expensive).
add spec to find the highest permission.
add methods to retrieve highest permission

- and use it for ssh-push access determination
- makes tests green.
add parameter to start script: disable rails server if -n is supplied
Save the deployed revision into file.
revert change of start script
Fix seeds for URI in name ontology field.
Merge branch 'staging' of github.com:ontohub/ontohub into staging
Pulling from remote repositories is more efficient now.

solves #598
Refactored GitRepository::GetDiff

Lazy creation of diff to increase the performance.
solves #598 and #609
fix the extraction of internal iri when parsing

Since a hets update, hets does not enclose uris
consistently in angle brackets. We need to
check for them, before stripping the uri.

Also deactivates the Reference-Node-Callback (unnecessary).
Merge pull request #613 from ontohub/fix_iri_extraction

fix the extraction of internal iri when parsing