Update README.md
Rename Principal to avoid clash with transmartApp
Merge pull request #24 from thehyve/features/CHERKASY-61_RESTcall_subjects_per_concept

CHERKASY-61 RESTful webservice: subjects per concept
Merge pull request #18 from FreekDB/master

Update README.md
AccessLevelTestData should be src/
Change UsersResourceService to load by username
travis: add branch detection for pull requests
Map AccessDeniedException to 403
Fix hardcoded branch; show travis env
Fix install_branch_coreapi for travis
Merge pull request #26 from thehyve/change_users_resource

Change UsersResourceService to load by username
AccessLevelTestData: use ConceptTestData

instead of StudyTestData
CHERKASY-61 refinement of TestData and ClinicalTestData, 2 observations now in the default data