introduces java 8 lambdas in some places
Integrates administ. of public indexes into CRUD
- adds field publishScheme to regal object
valid values are public and private
- modifies the semantic of accessScheme and publishScheme
- accessScheme organizes the access to :pid/data
- publishScheme organizes the access to most of all other reading
   operations
- changes signature of Search.java#remove
- refactors internal interfaces of actions in MyController.java