add clas
update documents regarding the licenses and clas
Update CONTRIBUTING.md
Merge tag 'v1.11'

[maven-release-plugin]  copy for tag v1.11
comment out gpg plugin
Added a ad-hoc way of manually specifying primary keys for tables or
views. Useful for materialized views and views where the user know what
is a key
Merge branch 'bugfix/mappingProcessorIteration' of github.com:ontop/ontop into feature/viewKeys

This bugfix must be merged into the viewKeys branch, as otherwise the branch cannot be used on the mappings where it is needed
Added foreign key reading to the view key reader manual "fake" keys
Prints out all foreign keys to the console. Added a view_keys for the
testing.
Merge branch 'develop' of github.com:ontop/ontop into feature/viewKeys
Merge branch 'develop' of github.com:ontop/ontop into feature/viewKeys
Merge remote-tracking branch 'origin/develop' into feature/viewKeys
Removed printing of keys
Update README.md

update the url of travis
Merge remote-tracking branch 'origin/develop' into feature/viewKeys
Moved the filename for view_keys from hardcoded to QuestPreferences
Added a preference for disabling the reading of view keys from file. Set
to default false
Add comment in SQL Generator
Merge branch 'develop' of github.com:ontop/ontop into develop
correct package name