7033660: Update copyright year to 2011 on any files changed in 2011Reviewed-by: dholmes
7021582: convert jar/zip code and tests to use try-with-resourcesReviewed-by: alanb, dholmes, sherman
6943119: Rebrand source copyright noticesReviewed-by: darcy, weijun
6763122: ZipFile ctor does not throw exception when file is not a zip fileReviewed-by: bristor
6440786: Cannot create a ZIP file containing zero entriesSummary: Allow reading and writing of ZIP files with zero entries.Reviewed-by: alanb