Prepared Database, Service and Dao
Added unique Index to votes

- if the user changes his vote, the old value will be overriden
- the old value ist only persisted in the audit table
Reenable hibernate jpamodelgen
Implement DAO method DeveloperDao.findParticipating()
Create CDI converter for transforming Developer -> DeveloperModel
Implemented building of the voting table with DB values
Calculate and display total points
Show propability and random range start and end
Sort Decision-Table by locationName
Merge branch 'decicion'