Moves account value factory to database
Moves Account Value Factory in Database Layer
Extracts AccountValueFactoryInterface and moves the factory in the database layer
Balance service renamed to Balancer
Moves AccountRepository and interfaces to database layer
Moves Balance database related operations to database layer
Renames  BufferCanBeClosed to BuffersAreNegative
prepares the code for further refactoring
Adds same navigation across module
Detects right margin
Merge branch 'master' into refactoring/database_layer