Add some of the basic layout and 2 test links for testing the
"active_link" css attribute
Add authentication entry to pom.xml
Add session implementation
restore planned architecture
GUI logic for which data is visible
add from and to time to table
table now updates itself every 5 seconds
add the filter form
Merge branch 'master' into db-services
Switch to app config and enable opSlot service
opSlotService: Implement initial filter queries

Date is and ranges are still missing.
Small changes for auth
Add login
Restore test config
Add doctor repository
Add user entity
Add missing operation types
Add Utils for password hashes and initial TestData class
Move role to model
testData: Add role