8156615: Catch parameter can be a BindingPattern in ES6 mode
Summary: Added parser support for catch parameter being a binding pattern
Reviewed-by: sundar, hannesw, attila
Contributed-by: srinivas.dama@oracle.com

8059843: Make AST serializable
Reviewed-by: hannesw, lagergren

8054834: Modular Source Code
Reviewed-by: alanb, chegar, ihse, mduigou
Contributed-by: alan.bateman@oracle.com, alex.buckley@oracle.com, chris.hegarty@oracle.com, erik.joelsson@oracle.com, jonathan.gibbons@oracle.com, karen.kinnear@oracle.com, magnus.ihse.bursie@oracle.com, mandy.chung@oracle.com, mark.reinhold@oracle.com, paul.sandoz@oracle.com