Fix interface definition
Add Login
Resolve conflict
Resolve conflict
Merge branch 'development' of github.com:planeta/quark into development
Revert "Merge branch 'development' of github.com:planeta/quark into development"

This reverts commit b7512d367e883e06e7d0933b1901817fc0454c74, reversing
changes made to dfd46f08690dacb3b451db8cb7648d655b2cfa38.
Fix ResearcherManager
Fix GroupManager
Second batch of fixes to ResearcherManager
Re-format ResearcherManager
Simplify system interface 'Create group'
- Add group creation
Add logout
Merged interface
Header and logout