7177386: Add attribution support for method references
Summary: Add type-checking/lookup routines for method references
Reviewed-by: jjg, dlsmith

5088624: cannot find symbol message should be more intelligent
Summary: Resolve.java should keep track of all candidates found during a method resolution sweep to generate more meaningful diagnostics
Reviewed-by: jjg

6968063: provide examples of code that generate diagnostics
Reviewed-by: mcimadamore