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

7175911: Simplify error reporting API in Check.CheckContext interface
Summary: Make error messages generated during Check.checkType more uniform and more scalable
Reviewed-by: jjg, dlsmith

7151492: Encapsulate check logic into Attr.ResultInfo
Summary: ResultInfo class should be used to make attribution code transparent w.r.t. check logic being used
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

6326754: Compiler will fail to handle -Xmaxerrs with -ve numbers
Reviewed-by: ksrini