CHERKASY-58 Implement /studies/<studyId>/concepts
-adding methods OntologyTerm.getAllDescendants
Small comment imporvements
Merge pull request #2 from thehyve/features/CHERKASY-implement-api-calls

CHERKASY-58 Implement /studies/<studyId>/concepts
added support for VCF
CHERKASY-61 RESTful webservice: Implement /studies/<studyId>/concepts/<conceptId>/subjects
-adding method PatientsResource.getPatients(OntologyTerm)
[CHERKASY] Add new api method for obsrvations
CHERKASY-61 RESTful webservice: Implement /studies/<studyId>/concepts/<conceptId>/subjects
-implementation of OntologyTerm.getPatients()
-integration tests
-removed previous impl of PatientsResourceService.getPatients(OntologyTerm)
Remove semicolon
Merge pull request #4 from thehyve/features/CHERKASY-61_RESTcall_subjects_per_concept

CHERKASY-61 RESTful webservice: Implement /studies/<studyId>/concepts/<c...
Minimal API to get allowed operations on resources
Merge pull request #5 from thehyve/features/cherkasy-implement-observations-calls2

[CHERKASY] Add new api method for obsrvations
Merge pull request #6 from thehyve/access_api

Minimal API to get allowed operations on resources
UsersResource:  fetch by username instead of id
Add new exception for access denied
Merge pull request #8 from thehyve/change_users_resource

Change users resource; add access denied exception
Updates retrieveData signature.

Includes Sets, excludes Study.
Adds getPatients to QueriesResource.
Merge branch master into features/cherkasy-implement-observations-calls2
Merge pull request #9 from thehyve/features/cherkasy-implement-observations-calls2

Features/cherkasy implement observations calls2
Add QueryDefinitionXmlConverter