8011044: Remove support for 1.5 and earlier source and target optionsReviewed-by: darcy, jjgContributed-by: neil.toda@oracle.com, brian.goetz@oracle.com
8006775: JSR 308: Compiler changes in JDK8Reviewed-by: jjgContributed-by: mernst@cs.washington.edu, wmdietl@cs.washington.edu, mpapi@csail.mit.edu, mahmood@notnoop.com
Merge
6987760: remove 308 support from JDK7Reviewed-by: darcy, mcimadamore
6968063: provide examples of code that generate diagnosticsReviewed-by: mcimadamore