8133896: Update javax.lang.model APIs
Reviewed-by: darcy, jjg

8033414: javac Plugin to receive notification (before and) after the compilation.
Summary: Introducing TaskEvent.Kind.COMPILATION, sending this event before and after compilation.
Reviewed-by: jjg, jfranck
Contributed-by: joel.franck@oracle.com, jan.lahoda@oracle.com

6975005: improve JavacProcessingEnvironment.Round abstraction
Reviewed-by: darcy

Initial load