Move delimited text rating cursor into data.text package
Add `@since` annotations to text parameters
Move user and file DAO providers to `.text`.
Use Grapht dev version with aliases
Relocate parameters for text-based data files
Move SimpleFileRatingDAO to text package
Add Plus event (#517)

- Plus event interface
- SimplePlus implementation and factories
- Tests for the factories
Add EventBuilder abstraction
Add UnaryEventBuilder abstraction for unary events
Add PlusBuilder and a test class
Add Factory interface and utility class
Add multiPlus factory method
Add plus count summarize