Code clean-up
Add custom Spring Data REST configuration
Use links for Concepts in most places
Rename StudyVariables and StudyReferences 

- Without the Study!
Ignore vim swapfiles
Fix references to entity keys

- Fix study_variables references
- More sane naming conventions
Fix whitespace in XSLT
Disable hibernate debug output
Add variables mapping query + fixes to other queries
Move types to own package
Cleanup
Merge branch 'develop' of github.com:gertvv/trialverse into develop

* 'develop' of github.com:gertvv/trialverse:
  Disable logging (fix startup hang)
  Fix build errors: depend on guava
Disable logging (fails to load)
[BROKEN] Change dbms layout

- Move concepts back to own tables
- Use hstore for metadata
- User arrays for notes
[BROKEN] Add name and description to intermediates
Refactor dbms structure
Merge remote-tracking branch 'origin/develop' into develop

* origin/develop:
Merge branch 'triplestore' into feature/triplestore

* triplestore:
  Refactor dbms structure
  [BROKEN] Add name and description to intermediates
  [BROKEN] Change dbms layout
Add work in progress importer of ADDIS 1.x files
Convert different top level concepts to turtle