alter startup-script to use valid syntax

The valid syntax for sidekiq queues uses
-q flags before every queue instead of
the comma-separated list.
Look
[here](https://github.com/mperham/sidekiq/blob/master/Changes.md#2172)
for more information.
add homebrew installed hets to search_path.
bump minimal hets working version number

Importing referenced OWL-ontologies will fail for
earlier versions.
Merge pull request #577 from ontohub/fix_start_development_script

alter startup-script to use valid syntax
Merge branch 'staging' into develop
Merge pull request #578 from ontohub/os_x_hets_management

OS X hets management
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.
Merge branch '599-fix_group_permissions_for_ssh' into develop
Merge branch 'develop' into develop.ontohub.org