8164971: PNG metadata does not handle ImageCreationTime
Reviewed-by: prr, bpb, jdv
Contributed-by: prahalad.kumar.narayanan@oracle.com

8166988: Improve image processing performance
Reviewed-by: serb, vadim, mschoene

4924727: reader.abort() method does not work when called inside imageStarted for PNG
Reviewed-by: prr, serb, bpb

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